Prepare cake according to package directions, adding coconut and poppy seeds to batter. , Pour into a greased 13x9-in. baking pan. Bake at 350° until a toothpick inserted in the center comes out clean, 20-25 minutes. Cool completely. , In a large bowl, whisk the milk, extract and pudding mixes for 2 minutes. Let stand for 2 minutes or until soft-set. Spread over the cake. Spread with whipped topping. Sprinkle with toasted coconut if desired.