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Espresso Brown Butter Toffee Cookies

Espresso brown butter toffee cookies with deeply golden, nutty browned butter and toffee bits baked until edges are set and centers stay slightly underdone. Finished with a quick flaky-salt sprinkle for a sweet-salty espresso flavor and tender chew.
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Prep Time 20 minutes
Cook Time 12 minutes
brown butter cooling 30 minutes
Total Time 1 hour 2 minutes
Servings: 28 cookies
Course: Dessert
Cuisine: American
Calories: 210
Ingredients Equipment Method Notes

Ingredients
  

Dry ingredients
  • 2.25 cup all-purpose flour
  • 1 tsp baking soda
  • 1 tsp espresso powder
  • 0.5 tsp salt
Wet ingredients
  • 1 lb unsalted butter, browned and cooled to solid
  • 1 cup brown sugar, packed
  • 0.5 cup granulated sugar
  • 2 eggs
  • 2 tsp vanilla extract
Mix-ins and topping
  • 1 cup toffee bits (Heath bar pieces)
  • 0.5 cup dark chocolate chips
  • Flaky sea salt for topping for sprinkling

Equipment

  • 1 cast iron skillet
  • 1 sheet pan

Method
 

Brown the butter (cool until scoopable)
  1. Brown the butter in a saucepan over medium heat until golden and nutty-smelling, then pour into a bowl and refrigerate until solid but scoopable, about 30 minutes. Visual cue: the milk solids should look deep golden-brown with a nutty aroma.
Mix and bake
  1. Preheat the oven to 375°F and line baking sheets with parchment. Visual cue: parchment should lie flat with no wrinkles.
  2. Whisk all-purpose flour, baking soda, espresso powder, and salt together in a bowl until evenly combined. Visual cue: the espresso powder should be streak-free throughout the mixture.
  3. Beat the solidified brown butter with the brown sugar and granulated sugar until creamy, about 1 minute, then add eggs one at a time and mix in vanilla extract. Visual cue: the mixture should look lighter and smooth.
  4. Fold the flour mixture into the butter mixture just until no dry streaks remain, then fold in toffee bits and dark chocolate chips. Visual cue: the dough should be thick with evenly distributed toffee and chocolate.
  5. Scoop dough into 2-tablespoon rounds and place on the prepared baking sheets with space between. Visual cue: rounds should be roughly uniform in size.
  6. Bake at 375°F for 10 to 12 minutes, until edges are golden but centers look slightly underdone. Visual cue: centers should still look a touch soft rather than fully set.
  7. Sprinkle the cookies immediately with flaky sea salt, then cool on the pan for 5 minutes. Visual cue: salt should adhere before the surface firms up.

Notes

For best browning, avoid stirring constantly after the butter foams—watch the color closely and stop at deep golden-nutty, then refrigerate until solid but scoopable. Store in an airtight container at room temperature for up to 5 days; freeze baked cookies for up to 2 months. For a dairy-free swap, use a 1:1 plant-based butter designed for baking (brown-and-solid behavior varies).