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Frosted Snickerdoodle Bars

Soft, chewy, cinnamon-kissed blondie bars topped with creamy cinnamon frosting—these frosted snickerdoodle bars offer all the comfort of classic cookies with less work and more wow.

Ingredients
  

For the Blondie Bars:

  • 1 cup unsalted butter melted
  • cups brown sugar packed
  • ½ cup granulated sugar
  • 2 large eggs
  • 2 tsp vanilla extract
  • cups all-purpose flour
  • 1 tsp baking powder
  • 1 tsp ground cinnamon
  • ½ tsp cream of tartar optional, for authentic snickerdoodle flavor
  • ½ tsp salt

For the Frosting:

  • ½ cup unsalted butter softened
  • 2 cups powdered sugar
  • 1 tsp vanilla extract
  • 1 –2 tbsp milk or cream as needed for consistency
  • ½ tsp cinnamon

Instructions
 

  • Preheat to 350°F (175°C). Line a 9x13-inch pan with parchment or grease well.
  • Whisk melted butter, brown sugar, and granulated sugar in a large bowl until smooth. Beat in eggs and vanilla.
  • In another bowl, whisk flour, baking powder, cinnamon, cream of tartar, and salt.
  • Stir dry ingredients into the wet mixture just until no dry spots remain—don’t overmix.
  • Spread batter in the pan. Bake for 25–28 minutes, until edges are golden and center is just set. Cool completely.
  • Beat butter until creamy. Gradually add powdered sugar, cinnamon, and vanilla. Add milk 1 tbsp at a time until smooth and spreadable.
  • Spread frosting on cooled bars. Optional: Sprinkle with cinnamon sugar. Slice and enjoy!