Cream butter and sugar until fluffy, about 3 minutes. Preheat oven to 350°F (175°C).

Beat in egg, vanilla, and almond extract until combined.

Whisk flour, cornstarch, baking powder, and salt. Slowly mix into butter mixture. Shape dough into a disc, wrap, and chill 30 minutes.

Roll dough to ¼‑inch thickness on a floured surface. Cut circles or snowman shapes. Reroll scraps once.

Bake on parchment‑lined sheets 8‑14 minutes (depending on size) until edges are barely golden. Cool 5 minutes on sheet, then transfer to a rack.

Whisk powdered sugar with 2 tbsp milk and ½ tsp vanilla for icing; add color if desired. Pipe on snowmen features and press candies while wet. Let set 30 minutes.