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Why do my hamburger patties puff up?

When cooking hamburger patties, it can be frustrating when they puff up and become thick in the middle instead of staying flat. A puffy patty does not cook evenly, often leaving the inside underdone while the outside dries out. There are a few common reasons why hamburger patties tend to puff up during cooking:

Using too lean of beef

The fat content of the ground beef you use to make patties makes a big difference in how much they puff while cooking. Lean beef with only 10-15% fat can easily cause patties to puff up and shrink, leaving them dense and chewy. Choose ground beef that is 80/20 or 85/15 lean to fat ratio. The higher fat content will keep the patties moist and tender while holding their shape better during cooking.

Overworking the meat

When forming the patties, take care not to overwork the meat by kneading or squeezing it too much. This can develop the proteins in the meat too much, causing it to become dense and shrink up while cooking. Gently form loose patties without compacting the meat too tightly.

Making the patties too thick

Thicker hamburger patties will have a tendency to puff up more in the middle as they cook. Keep patties no more than 3/4 inch thick for even cooking. Thinner patties around 1/2 inch thick will stay flatter as they cook.

Not properly scoring the patties

Scoring or poking holes in the patties before cooking gives steam a way to escape instead of puffing up the center. Use your finger to make five or six shallow indentations evenly over the patty on both sides. This allows rendered fat and steam to escape so the patty stays flatter on the grill or pan.

Cooking over high heat

Cooking the patties over high, intense heat can cause the outside of the meat to stiffen and contract before the inside has cooked through. This makes the patties puff up in the middle. Maintain a medium heat while cooking to allow the patties to cook through gently without the outside tightening up too fast.

Tips for preventing puffy patties

Follow these simple tips when forming and cooking hamburger patties to prevent puffing:

  • Use ground beef with higher fat content – 80/20 lean to fat ratio
  • Handle the meat gently when forming patties
  • Make patties no more than 3/4 inch thick
  • Use your finger to score or poke holes in the patties before cooking
  • Cook over medium heat, not high heat

Properly scoring the patties before cooking is one of the most effective ways to prevent puffing. This allows steam to escape so the patty remains flat as it cooks.

How to fix puffed up patties

If your patties do puff up during cooking, there are a couple fixes:

Smash them down

Use a metal spatula to firmly press down on the patties while they cook. This will flatten them back out so they cook evenly. Continue pressing on them periodically during cooking to keep them flattened.

Bake them in the oven

If the patties have already puffed up, finish cooking them in the oven. Place in a baking dish and bake at 375°F for 5-10 minutes until cooked through. The dry oven heat will flatten them out while ensuring they are fully cooked.

Recipe for flat, juicy hamburger patties

This simple recipe ensures tender, juicy hamburger patties that hold their shape while cooking:


  • 1 1⁄2 lbs ground beef (80% lean)
  • 1 teaspoon salt
  • 1⁄2 teaspoon pepper
  • Optional seasonings: onion powder, garlic powder, Worcestershire sauce


  1. Gently mix ground beef with salt, pepper, and any other seasonings until just combined. Do not overwork the meat.
  2. Divide meat into 4 equal portions. Gently form each into 1/2 inch thick patties.
  3. Use your finger to make 5-6 indentations all over the surface of the patties. This will help them stay flat during cooking.
  4. Heat a large skillet over medium heat. Cook patties for 4-5 minutes per side until cooked through. Smash down on any patties that puff up.
  5. Serve immediately on buns with your favorite toppings.

Scoring the patties before cooking and using medium heat are key to preventing puffing. The 80/20 ground beef keeps these patties juicy and tender.

Visual guide to properly scoring patties

Here is a helpful visual guide to properly scoring hamburger patties before cooking to prevent puffing:

Step Image Description
1 Gently form ground beef into a 1/2 inch thick patty. Do not overwork the meat when shaping.
2 Use your finger to make indentations all over both sides of the patty. Make 5-6 scores evenly over the surface.
3 Patty is properly scored with shallow finger indentations. This will allow steam to escape during cooking.

Scoring before cooking is a simple way to prevent hamburger patties from puffing up as they cook.


Puffy hamburger patties can ruin a good burger, but thankfully the solution is simple. Choose ground beef with higher fat content, handle the meat gently, make thinner patties, and properly score them before cooking over medium heat. Scoring or poking holes all over the patties allows steam to escape so they stay flat on the grill or pan. Follow the recipe and visual guide above for tender, juicy patties that hold their shape while cooking. With a few easy tips, you can enjoy picture-perfect burgers every time.