Ingredients: 

Cooking spray

4 1/2 c. (540 g.) all-purpose flour

2 tsp. baking powder

1 tsp. kosher salt

2 1/2 c. (500 g.) granulated sugar

2 c. (4 sticks) unsalted butter, softened

2 large eggs

1 large egg yolk

1 tbsp. pure vanilla extract

FROSTING

2 c. (230 g.) confectioners’ sugar 

3/4 c. (1 1/2 sticks) unsalted butter, softened

2 tbsp. heavy cream

1 tsp. pure vanilla extract

Pink food coloring (optional) 

Sprinkles, for decorating

Steps to Make It:

Step 1: Preheat the oven to 350°. Line a 13″ x 9″ pan with parchment, leaving a 2″ overhang on 2 opposite sides. Grease parchment with cooking spray. In a large bowl, whisk flour, baking powder, and salt until combined.

Step 2: In another large bowl, using a handheld mixer on medium-high speed, beat granulated sugar and butter until combined and smooth. Add eggs and egg yolk, one at a time, beating to blend after each addition. Beat in vanilla.

Step 3: Add dry ingredients and mix with a wooden spoon until just combined. Spread batter in an even layer in the prepared pan.

Step 4: Bake bar until golden and top feels set, 35 to 40 minutes. Let cool.

FROSTING

Step 1: In a large bowl, using a handheld mixer on medium-high speed, beat confectioners’ sugar and butter until smooth. Add cream and vanilla and beat until combined. Add food coloring and beat to combine until desired color is reached (if using).

Step 2: Using parchment overhang, remove the bar from the pan. Frost the top of the bar, then top with sprinkles.

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