01 - Whisk together flour, baking powder, and salt in a medium bowl. Set aside for later use.
02 - Beat softened butter and granulated sugar in a large bowl until light and fluffy, approximately 2-3 minutes.
03 - Mix in the egg and vanilla extract until fully incorporated into the butter mixture.
04 - Gradually blend dry ingredients into wet mixture until dough forms. Be careful not to overmix.
05 - Divide dough in half, form into flat disks, wrap in plastic, and refrigerate for minimum 30 minutes.
06 - Heat oven to 350°F. Line baking sheets with parchment paper.
07 - On lightly floured surface, roll one dough disk to 1/4-inch thickness.
08 - Press bunny-shaped cookie cutters into dough and transfer cutouts to prepared baking sheets, spacing 1 inch apart.
09 - Bake for 8-10 minutes until edges barely turn golden. Cool on sheets 5 minutes, then move to wire racks.
10 - Whisk powdered sugar, milk, and vanilla extract in small bowl until smooth. Add food coloring if desired.
11 - Apply icing to cooled cookies and add sprinkles. Allow icing to set completely before serving.