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 butter and sugar with an electric mixer until light and fluffy, about 3 minutes.
04 - Add eggs one at a time, beating well after each addition. Mix in vanilla extract and almond extract if using.
05 - Gradually add dry ingredients to wet mixture, mixing until just combined. Do not overmix.
06 - Spread dough evenly in prepared pan. Bake 18-20 minutes until edges are barely golden and center is set. Cool completely in pan.
07 - Beat butter until creamy. Add powdered sugar, vanilla, and 2 tablespoons milk. Beat until smooth and fluffy, adding more milk if needed for spreadable consistency.
08 - Divide frosting and tint portions with pastel food coloring if desired. Spread frosting evenly over cooled cookie base.
09 - Sprinkle with Easter sprinkles. Lift bars from pan using parchment overhang and cut into squares.