Preheat oven to 325°F. Coat 6 cavity pumpkin and leaves silicone baking mold with baking spray.
Sift together flour, baking powder, baking soda, cinnamon, and salt.
Beat eggs, oil, sugar, and vanilla. Add sifted ingredients and mix well. Stir in shredded zucchini and nuts.
Fill each cavity in the mold about 1/2 full. Place mold on baking sheet before placing in the oven. Bake for 25 minutes, or until a toothpick inserted in center comes out clean.
Remove from oven and cool on baking racks.
Outline lines on pumpkins and leaves with holiday colored decorating icing.