01 -
Preheat oven to 350°F (177°C). Line a 9 x 9-inch baking pan with parchment paper, allowing overhang for easy removal.
02 -
In a large bowl, cream together 1/2 cup softened salted butter and 1 cup granulated sugar until pale and fluffy. Beat in 1 large egg and 1 teaspoon vanilla extract until fully incorporated.
03 -
Gradually mix in 2 cups all-purpose flour and 1 teaspoon baking powder to the wet mixture until a thick dough forms. Gently fold in 1/4 cup festive sprinkles.
04 -
Evenly press dough into the prepared baking pan. Bake in preheated oven for 20 minutes or until golden at the edges and set in the center.
05 -
Remove pan from oven. Allow bars to cool completely in the pan. Using the parchment paper overhang, carefully lift bars out of the pan and transfer to a work surface.
06 -
Beat together 2 cups powdered sugar, 1/2 cup softened salted butter, 3 tablespoons softened cream cheese, 1 teaspoon vanilla extract, and 2 tablespoons milk until smooth and spreadable.
07 -
Generously spread frosting over the cooled cookie bars. Sprinkle additional festive sprinkles evenly over the surface.
08 -
Cut into squares with a sharp knife and serve immediately, or allow frosting to set for a firmer texture.