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 3-4 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 the wet mixture, mixing on low speed until just combined. Avoid overmixing to maintain tender texture.
06 - Press dough evenly into the prepared pan using a spatula to create a smooth surface. Bake for 18-20 minutes until edges are barely golden and center is set. Cool completely in the pan before frosting.
07 - Beat butter until creamy. Add powdered sugar, vanilla, and 2 tablespoons milk. Beat until smooth and fluffy, adding additional milk if needed to achieve spreadable consistency. Optionally divide frosting and tint portions with pastel food coloring.
08 - Spread frosting evenly over the completely cooled cookie base. Immediately sprinkle with festive Easter sprinkles before frosting sets.
09 - Using parchment paper overhang, lift bars from the pan. Cut into 16 equal squares. Store in an airtight container at room temperature for up to 4 days or refrigerated for 1 week.