01 - Preheat oven to 350°F. Grease and line a 9x13 inch baking pan with parchment paper, leaving an overhang for easy removal.
02 - In a medium bowl, whisk together flour, baking powder, and salt until well combined.
03 - In a large bowl, beat softened butter and granulated sugar with an electric mixer until light and fluffy, approximately 2–3 minutes.
04 - Add eggs one at a time, beating thoroughly after each addition. Mix in vanilla extract and almond extract if using.
05 - Gradually add dry ingredients to the wet mixture, mixing on low speed until just combined. Avoid overmixing to maintain tender texture.
06 - Press dough evenly into the prepared pan, smoothing the surface with a spatula. Bake 18–20 minutes until edges are barely golden and center is set. Cool completely in the pan.
07 - Beat softened butter until creamy. Add powdered sugar, vanilla, and 2 tablespoons milk. Beat until smooth and fluffy, adding additional milk as needed for spreadable consistency. Divide and tint with pastel food coloring if desired.
08 - Spread frosting evenly over cooled cookie base. Top with Easter sprinkles immediately. Lift from pan using parchment overhang and cut into 16 squares.