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Brown Butter Snickerdoodle Blondies

These Brown Butter Snickerdoodle Blondies are thick, chewy dessert bars made with nutty brown butter, rich brown sugar, and layers of cinnamon sugar baked into every bite. Finished with a warm brown sugar toffee syrup.
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Prep Time 20 minutes
Cook Time 30 minutes
Cooling 40 minutes
Total Time 1 hour 30 minutes
Servings: 12 Servings
Course: Dessert
Ingredients Equipment Method

Ingredients
  

For the Snickerdoodle Blondies
  • 1 cup (2 sticks) unsalted butter browned
  • 2 cups brown sugar packed
  • 2 large eggs room temperature
  • 2 tbsp vanilla extract
  • 2 tsp baking powder
  • 1 tsp salt
  • 2 cups all-purpose flour
  • 4 tbsp granulated sugar
  • 3 tsp cinnamon
For the Toffee Syrup
  • 1 cup brown sugar packed
  • ½ cup water
  • 4 tbsp unsalted butter
  • 1 tsp vanilla extract
  • ¼ tsp salt

Equipment

  • 9x13 baking dish
  • Parchment paper
  • Saucepan
  • Large mixing bowl
  • Whisk
  • Rubber spatula
  • Small saucepan
  • Measuring cups & spoons

Method
 

Snickerdoodle Blondies
  1. Brown the Butter
    In a light-colored saucepan over medium heat, melt the butter. Once melted, it will foam and pop, whisk constantly.
    Watch closely for:
    golden-brown specks at the bottom
    a nutty aroma
    Immediately pour the butter and all the brown bits into a large mixing bowl. Let cool for 5–7 minutes.
  2. Build the Batter
    Whisk the brown sugar into the warm brown butter until glossy and smooth. Add eggs and vanilla, whisking vigorously for about 1 minute until thick and slightly lighter in color.
  3. Add Dry Ingredients
    Fold in flour, baking powder, and salt just until combined. Do not overmix, stop as soon as the flour disappears.
  4. Layer + Swirl
    Preheat oven to 350°F (175°C). Line a 9×13 pan with parchment, leaving overhang for lifting.
    1. Spread half the batter evenly in the pan
    2. Sprinkle half the cinnamon sugar over the batter
    3. Drop remaining batter in dollops on top and gently spread or swirl
    4. Finish with remaining cinnamon sugar
  5. Bake
    Bake for 25–30 minutes.
    Look for a center that’s just set with a slight softness.
    Do not overbake, they’ll firm up as they cool.
    Cool in the pan for at least 30–40 minutes before cutting.
Brown Sugar Toffee Syrup
  1. In a small saucepan over medium heat, combine brown sugar, water, and butter.
  2. Bring to a gentle boil, whisking occasionally until smooth.
  3. Reduce heat to low and simmer 4–6 minutes, until slightly thickened.
  4. Remove from heat and stir in vanilla and salt. It will thicken more as it cools.