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A baking pan with blondie batter sits inside the preheated oven. The edges begin to turn golden brown, and the aroma of baking fills the air.

Christmas Blondie Bars

These Christmas Blondie Bars are rich, chewy, and filled with M&M's and chocolate chips. Perfectly golden brown on the edges and soft in the center for a festive, easy holiday treat!
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Prep Time 10 minutes
Cook Time 25 minutes
Total Time 32 minutes
Course Dessert
Cuisine American
Servings 12

Equipment

  • Medium saucepan
  • Medium bowl
  • Whisk
  • 8x8 baking pan
  • Spatula
  • Parchment paper
  • Cooking spray
  • Cup or bowl for cooling butter

Ingredients
  

  • ½ cup 1 stick butter (for browning)
  • 1 cup brown sugar packed
  • 1 large egg
  • 1 egg yolk
  • 1 teaspoon vanilla extract
  • 1 ¼ cups all-purpose flour
  • 1 teaspoon cornstarch
  • ½ teaspoon salt
  • ½ cup M&M's or any type you prefer
  • ½ cup chocolate chips milk chocolate recommended
  • Flaked salt for topping, optional

Instructions
 

  • Brown the butter in a medium saucepan until golden brown with a nutty aroma. Let it cool.
    A medium saucepan on a white marble cooktop with butter melting and turning golden brown. The saucepan is gently swirled, and the butter gives off a rich, nutty aroma.
  • Preheat the oven to 350°F. Line an 8x8 pan with parchment paper and cooking spray.
    A bowl on the white marble cooktop with browned butter being whisked with brown sugar. The mixture appears smooth and glossy, signaling it's ready for the next ingredients.
  • Whisk together browned butter and brown sugar. Add egg, yolk, and vanilla.
  • Stir in cornstarch, salt, and flour. Gently fold in M&M’s and chocolate chips.
    A large mixing bowl on the white marble cooktop with an egg, egg yolk, and a splash of vanilla extract being added to the browned butter and sugar mixture. The ingredients blend smoothly.
  • Pour the batter into the pan, smoothing with a spatula. Top with extra M&M’s and flaked salt.
    Colorful M&M's and chocolate chips are folded into the dough in a bowl on the white marble cooktop. The candy pieces and chocolate chips are evenly mixed throughout.
  • Bake for 20-23 minutes until edges are golden. Let cool before serving.
    A baking pan with blondie batter sits inside the preheated oven. The edges begin to turn golden brown, and the aroma of baking fills the air.