01 -
Preheat oven to 350°F. Line a 9x9 inch baking dish with parchment paper, creating a sling. Spray lightly with baking spray. Set aside.
02 -
In a small bowl, whisk together all-purpose flour, cornstarch, and baking powder. Set aside.
03 -
Using a handheld mixer at high speed, beat softened butter in a medium bowl for 1 minute until creamy.
04 -
Add granulated sugar, vanilla extract, and almond extract to butter. Beat for 1 to 1½ minutes until mixture is light and fluffy.
05 -
Reduce mixer speed to low. Add eggs one at a time, beating well after each addition.
06 -
Increase mixer speed to medium-low. Add flour mixture gradually, one cup at a time, mixing just until incorporated after each addition.
07 -
Gently fold Christmas nonpareil sprinkles into the dough until evenly distributed.
08 -
Spread dough evenly in prepared baking dish. Bake for 20 to 22 minutes until edges are golden and a toothpick inserted in the center comes out clean. Let cool completely.
09 -
Beat softened butter, clear vanilla, and almond extract at medium-high speed for 1 minute until smooth.
10 -
Reduce speed to low. Alternately add powdered sugar (½ cup at a time) and heavy cream until fully combined. Increase speed to medium-high and beat 1 to 1½ minutes until frosting is smooth.
11 -
Remove cooled cookie bars from pan using parchment sling. Evenly spread frosting over bars using a spatula. Sprinkle with holiday nonpareil sprinkles. Slice into 1½ by 3 inch bars.