1Heat oven to 350°F (325°F for dark or nonstick pans). Place mini paper baking cup in each of 48 mini muffin cups. Make cake batter as directed on box--except stir in orange peel and 6 to 8 drops each red and yellow food colors. Divide batter evenly among cups, about 1 heaping tablespoonful each. Bake 14 to 18 minutes or until toothpick inserted in center comes out clean. Cool in pan 5 minutes; remove from pan and cool completely, about 10 minutes.
2In medium bowl, stir together frosting, 6 drops red food color and 8 drops yellow food color. Frost top of each cupcake. Using black gel, draw 2 triangles on each cupcake to look like pumpkin eyes, and draw a circle to look like a mouth.
3Cut fruit snack into 48 (1-inch) pieces; tightly roll each piece to make a stem for each pumpkin. Place stem at top of each pumpkin. Store loosely covered.