Preheat oven to 325 degrees F (165 degrees C). (If using a countertop induction oven, preheat to 325 degrees F.) Grease 12 pumpkin-shaped cupcake molds (silicon molds work well).
Sift 2 cups cake flour, cinnamon, baking soda, baking powder, and salt together in a bowl. Mix in sugar, oil, and eggs until combined. Stir carrots and pineapple into the batter.
Place 1 tablespoon cake flour in a bowl. Toss walnuts and chocolate chips in flour until coated; fold into batter.
Pour batter into cupcake molds to about two-thirds full; gently tap molds onto work surface to remove air bubbles.
Bake in preheated oven (or countertop induction oven) until a toothpick inserted into the center of a cupcake comes out clean, 20 to 25 minutes (or 15 to 20 minutes in the countertop induction oven). Cool to room temperature, 15 to 20 minutes; remove from molds.
Combine butter, cream cheese, and vanilla extract in a bowl; beat with an electric mixer until well blended, 4 to 6 minutes. Mix in confectioners' sugar on low speed, 1/2 cup at a time, until frosting is smooth and spreadable. Add lemon juice and orange food coloring; stir until combined. Refrigerate until set, 15 to 20 minutes.
Frost cupcakes with the cream cheese frosting; decorate with black decorating gel.
Nutritional Facts
Per 12 servings
Calories: 818
Carbohydrate: 89g
Fat: 49g
Fiber: 2g
Protein: 7g
Sugar: 60g
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