01 -
Combine softened butter and sugar in a large bowl and beat with an electric mixer until creamy. Add egg and vanilla extract and mix until combined. In a separate bowl, whisk together flour, baking powder, and salt. Gradually stir the dry mixture into the wet mixture on low speed until fully incorporated.
02 -
Divide the dough into two equal parts, shape into disks, wrap in plastic wrap, and refrigerate for at least 3 hours or overnight.
03 -
Preheat oven to 175°C (350°F) and line baking sheets with parchment paper. Roll the chilled dough on a lightly floured surface to just under 0.6 cm (¼ inch) thickness. Use a bunny cookie cutter to cut out shapes, place them on the baking sheets, and leave 5 cm (2 inches) between each cookie.
04 -
Bake cookies for 10-12 minutes until edges turn light golden. Allow to cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.
05 -
In a bowl, whisk together powdered sugar, 3 tablespoons of milk, corn syrup, and vanilla extract until smooth. Add more milk if needed for the desired consistency, where the frosting holds its shape when ribboned from a whisk.
06 -
Divide frosting into two parts. Mix brown or black food coloring into one part for facial details and transfer to a piping bag with a #3 tip. Transfer the white frosting to a piping bag with a #5 tip. Pipe a border of white frosting near the edge of the cookies, fill the outline, smooth using a decorating tool or toothpick, and dip frosting-side down into sanding sugar. Use the brown frosting to pipe eyes and noses. Allow to set fully before serving.