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Onion Swiss Pretzel Bun Burger

My Onion Swiss Pretzel Bun Burger taste amazing with a crispy outside beef patty and a flavorful center.  If you have not tried smashing burgers on your Blackstone Griddle, then you need to!!  

My mini pretzel bun burger made on a Blackstone Griddle has caramelized fresh onions and melted swiss cheese.  There is nothing like a Blackstone Griddle onion swiss burger!!  

Pair this mini onion swiss burger with griddle French fries or griddle sweet potato fries for a perfect dinner.  Try all my Blackstone snack foods and you will have a Super Bowl party smorgasbord.  

Onion Swiss Pretzel Bun Burger on a wooden cutting board.
Onion Swiss Pretzel Bun Burger

These grilled onion swiss smash burgers are simple to make and great for entertaining at a Super Bowl, tailgating, or any party that you might be having. Have you heard of a burger tower?  

How about a mini burger tower?!?!  It’s a stack of small burgers your guests get to sample.  Create an assortment of hamburgers and make a mini burger tower!! 

Blackstone Griddle Burger Tower- 3 different mini burgers - bottom burger, mushroom Swiss burger, middle, Onion Swiss pretzel bun burger, top cheeseburger.  Surrounded by kettle chips.
Blackstone Griddle Burger Tower

These onion & swiss pretzel bun burgers are simple to make and great for entertaining. Your first bite will have amazing homemade smash burger flavor that can’t be beat.

Blackstone smash burgers are so delicious!! If you are looking for more Blackstone Griddle comfort food recipes, check out all my Blackstone Griddle Recipes.

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What is a Blackstone Smash Burger?

A Blackstone smash burger is a small burger ball that is smashed thin and cooked on a flat-top griddle until both sides are crispy.  

Top with your favorite burger toppings and pair with a butter toasted mini pretzel bun or regular burger buns.  The smash burger flavors are endless!!!!!

How Do You Make a Blackstone Smash Burger?

Learning how to smash your burger on a Blackstone Flat Top takes a little bit of practice.  This is where many cooks fall short.  

Some use a smash Blackstone burger kit; others use a burger press.  You need to find the style that works for you!!   

I like to just use one griddle spatula along with a piece of parchment paper to make my smash burgers.  The trick is the parchment paper in-between the burger patty and the smashing tool!

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How Hot Should Griddle Be for Smash Burgers?

The temperature of your Blackstone Flat Top is very important.  If the griddle is not hot enough, you will not get a good crispy beef patty.  

If the temperature is too hot, the beef patties will become over cooked and loose it’s great flavor.  I like to set my griddle to medium heat.  

If you would like a griddle temperature, it should be around 375°F. All burgers cook differently!   This Blackstone griddle smash burgers tips and tricks will help you create the best burgers. 

How to Make an Onion Swiss Pretzel Bun Burger

Preheat the Blackstone Griddle Grill on medium heat.  Gather your ingredients to make your pretzel bun burger.  

You want to use ground beef that has a little bit of fat in it.  I like to use 80/20 ground beef (80% lean).  

Gently form your burger balls. That’s right, burger balls, not burger patties!  Start your fried onion burgers by lightly oiling the griddle.  

Caramelized Onions and Several Smash Burger Balls Cooking on a Blackstone Griddle.
Caramelized Onions and Several Smash Burger Balls Cooking on a Blackstone Griddle.

Place your onions onto the hot oil.  Let the onions caramelize as they cook and only toss occasionally.  

Onion Burger – Two Ways!

First Way:  Place the burger balls onto the hot flat top grill making sure to space them out.  Have the onions on the side, cooking separately with a little bit of olive oil.  

A pile of cooked onions on a flat top griddle along with a couple of round smash burger balls.
A pile of cooked onions on a flat top griddle along with a couple of round smash burger balls.

Smash the burger balls on the flat top (as described below).  Let the burger cook on both sides.  Assemble your swiss and grilled onion burger in layers.

Second Way:  After the sliced onions have been cooking on the griddle for several minutes (with a little bit of olive oil), place the burger ball on top of the cooking onions.  Smash the burger ball over top of the onions so that the ground meat and onions start cooking all together.  

When the burger is ready to flip, take the spatula under the whole pile and flip both the patty and onions at the same time.  Cook the second side of the patty until done.  Top with the swiss cheese and assemble your burger in layers.  

Try both cooking methods because they will taste completely different.  You will have to let me know which one is your favorite!!  I would love to know which one everyone likes best.

Smashing Burgers

Smashing burgers on a Flat Top griddle takes practice.  Use the back of your griddle spatula with a piece of parchment paper on top of the burger ball.  

Smashing Burger on a Blackstone Griddle with cooked onions and a couple of burger patties.
Smashing Burger on a Blackstone Griddle.

Flatten the burger balls in a quick swift motion getting them very thin.  Don’t forget, a thin patty is what you want! 

Some gridlers use 1 or 2 spatulas to smash the burger patty.  You might like to use a Blackstone burger press (hamburger press).  

All works, but the smashing burgers trick is to use wax or parchment paper in between the burger and the tool used to smash the patties.  

Once the beef burger patty is smashed, carefully peel the paper off starting on one side and working your way to the other side until the paper is completely separated from the beef patty.  

Season your mini grilled onion burger with your favorite seasoning such as salt and pepper.  My family likes to use Lawry’s Seasoned Salt and Morton’s Natures Seasons.  

Remember that the SMASHING burger patties should be thin and fry up crispy.  Let the burgers cook and do not fuss with them.  

Meanwhile, on a separate part of the griddle. Lightly butter the inside of the pretzel buns, place on the flat top, and toast while everything is cooking.  

You will not believe how much better these taste with toasted pretzel buns! If using older pretzel buns, using melted butter to create buttered buns will revive your bread. 

How Long to Cook Smash Burgers on a Griddle?

Smash patties fry up quickly!  Two to three minutes on each side if the Blackstone flat top is hot.  

Smash Burgers cooking on a Blackstone Griddle with fried onions.
Smash Burgers cooking on a Blackstone Griddle with fried onions.

Cook the first patty side until golden and crispy, then flip to cook the second side until desired doneness is achieved.  Place a slice of swiss cheese on top and let melt.  

Air temperature and wind will play a role in how long it takes to cook the patties.  You want a golden-brown crispy outside with a juicy inside.  

Cooking 2 Smash Burger Patties with a pile of grilled onions on a Flat Top Griddle.
Cooking 2 Smash Burger Patties with a pile of grilled onions on a Flat Top Griddle.

Don’t overcook the patties causing them to dry out.  Overcooked patties do not taste very well!  

Onion and Swiss Burgers Assembly

Once the onions and burger patties are cooked, it’s time to assemble your pretzel bun burger.  I made onion swiss sliders with mini pretzel burger buns.  

Start with the griddle toasted bottom pretzel bun topped with a layer of crisp lettuce.  Next, top with the melted swiss cheese smash burger.  

If making a double stack onion and swiss burger, add a second swiss cheese patty.  Top with the sautéed griddle onions and all your favorite toppings and condiments.  

Finally, place the toasted top pretzel bun to the Blackstone burger stack and serve while hot.  

Smashburger recipe – Blackstone style can be made with several different variations such as classic American cheese smash burger, grilled mushroom and swiss smash burger, patty melt, and so on.

Mushroom Swiss Smash Burgers Made on a Blackstone
Mushroom Swiss Smash Burgers on Blackstone

Smash Burger Tower

Have you heard about the trending smash burger tower?  What about a smash mini burger tower?  

A smash mini burger tower is several fully assembled mini burgers stacked on top of each other and then secured with a skewer which creates a burger tower.  

Smash Burger Tower Surrounded by Homemade Potato Chips.
Smash Burger Tower

Make a variety of different mini-Blackstone smash burgers into a smash burger tower to serve to each guest at your Super Bowl party or Tailgating event!! They will never forget your mini smash burger tower!!!!

  1. Ketchup
  2. Mayo
  3. Mustard
  4. Relish
  5. Sweet Relish
  6. Lettuce
  7. Sliced Pickles
  8. Grilled Mushrooms
  9. Cole Slaw
  10. BBQ Sauce
  11. Banana Peppers
  12. Pickled Peppers
  13. Fried Egg
  14. French Fries
  15. Avocado
  16. Crispy bacon
  17. Deep Fried Onion Rings
  18. Tomatoes
  19. Variety of Different Cheese Slices
  20. Cheese Sauce
  21. Seasonal Ingredients

What Sides Go with Smash Burgers?

Sweet Potato Fries on the Blackstone Griddle, Cheesy Tater Tots, Fried Mozzarella Balls, Blackstone French Fries, Hasselback Potato, Smashed Potatoes on the Blackstone, Griddle Butternut Squash, Glazed Carrots, Griddle Corn on the Cob, Sautéed Lions Mane Mushrooms, and a cold beer!!

Blackstone Griddle cooked Onion Swiss Pretzel Bun Burger on a wooden cutting board.
Blackstone Griddle cooked Onion Swiss Pretzel Bun Burger.

Pretzel Bun Burger on Blackstone – FAQ

Pretzel Buns – Where to buy?

You have several options when buying pretzel burger buns.  Try your local bakery.  If you don’t see any then ask.  They might have insight on if they will make some or where to get them.  Try your local grocery store.  Check the bread isle, infront of the deli counter or in their bakery department (if they have one).  Even Check the freezer section.  If all those options fail, try your bulk foods store or restaurant stores.   We have a GFS (Gordon Food Service) store that is great for restaurant foods that is available to the public.  If all else fails, ask a local restaurant if they will sell you just the buns.  

Calories in a Burger Bun?

These mini, 2-ounce pretzel buns have 170 calories each.  The average sized, white burger bun (which weighs a little over 2 ounces) has 130 calories.     

What do pretzel burger buns taste like?

Pretzel burger buns have a super soft inside and a deep brown, chewy outside.  They remind me of a bagel.  People either love them or hate them.  Just like people love bagels or they hate them.

How Much Ground Beef Per Patty for a Blackstone Griddle Smash Burgers?

Mini Smash Hamburger Meat Ball – 2-ounce, Regular Hamburger Meat Ball – 4 ounces, Large Hamburger Meat Ball – 8 ounces 

No Blackstone Griddle?

If you don’t have a Blackstone Griddle, make your pretzel burgers or any smash burgers in a large skillet on the stove.  Follow the same rule of thumb when cooking on the stove.

Onion Swiss Pretzel Bun Burger on Blackstone Recipe

Get the recipe and nutrition calories below.

Yield: 8 Mini Burgers

Onion Burger

Onion Swiss Pretzel Bun Burger on a wooden cutting board.

My Onion Swiss Pretzel Bun Burger taste amazing with a crispy outside beef patty and a flavorful center. If you have not tried smashing burgers on your Blackstone Griddle, then you need to!!

Prep Time 5 minutes
Cook Time 10 minutes
Total Time 15 minutes


  • Ground Beef. 1 pound
  • Onion, Sweet, Sliced 8 ounces
  • Swiss Cheese, Slices 8 each
  • Pretzel Buns, Mini 8 each


  1. Make 8 (2 ounce) ground beef balls. Slice onions if needed.
  2. Pre-heat your Blackstone Griddle Grill on medium heat.
  3. Put some olive oil onto the Blackstone Griddle and top with the sliced onions. Saute until golden brown and caramelized.
  4. Place the smash burger balls onto the hot griddle.
  5. Using a piece of parchment paper along with your griddle spatula or burger press, flatten each burger ball into a very thin patty. Carefully, peel the paper off each smashed patty.
  6. Season each smashed patty with your favorite seasonings.
  7. Butter each pretzel bun and place on the griddle until warmed and toasted.
  8. Cook the burger patty until crispy brown (about 2-3 minutes on each side) on both sides. When the smashed patty is almost done, top with a slice of the swiss cheese.
  9. Assemble your onion swiss pretzel bun burger by starting with the bottom pretzel bun, add any condiments if desired, the cheese covered burger patty, top with the sauteed sliced onions and any final toppings. Add the top pretzel bun and serve while they are hot.


Store any leftovers smash burgers in the fridge for up to 6 days.

Serve with your favorite burger sides.

Create a variety of different smash burgers and make a smash burger tower.

Make full sized smash burgers by doubling the ground beef and using larger hamburger buns.

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As an Amazon Associate, I earn from qualifying purchases. This post may contain affiliate links. Click on the highlighted text in a post to explore a product. If you purchase through one of them, I will receive a commission (at no additional cost to you). I ONLY EVER ENDORSE PRODUCTS THAT I TRULY LOVE. Thank you for your support!

Nutrition Information



Serving Size


Amount Per Serving Calories 434Total Fat 22gSaturated Fat 10gTrans Fat 1gUnsaturated Fat 8gCholesterol 99mgSodium 4307mgCarbohydrates 31gFiber 1gSugar 4gProtein 28g

Note: For exact nutritional information, consult your dietitian. All nutritional information is simply a guideline.

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By on January 20th, 2022
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About Sherry

Welcome to FROM MICHIGAN TO THE TABLE! My name is Chef Sherry Ronning and I am a food blogger from Michigan. Professionally cooking and baking Midwestern Cuisine for more than 30 years. Specializing in fresh fish, venison, farm raised meats and griddle recipes. Please enjoy my recipes!!

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3 Comments on “Onion Swiss Pretzel Bun Burger”

  1. Thank you for all your Blackstone tips! I love cooking outdoors and this is our new favorite burger. Your topping recommendations were on point! Yum!


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