Frankenstein Cupcakes

Name: Frankenstein Cupcakes
Prep time: 20 min
Total time: 20 min
Cuisine: American
Ingredients: 3 c. all-purpose flour, spooned and leveled; 2 c. granulated sugar; 1 tsp. baking powder; 1 tsp. baking soda; 1/2 tsp. salt; 3/4 c. canola oil; 4 large eggs; 2 tsp. pure vanilla extract; 1 1/2 c. full-fat buttermilk; Green food coloring gel; 1 c. unsalted butter, at room temperature; 2 to 3 tablespoons whole milk or heavy cream; 1 tsp. pure vanilla extract; 4 c. confectioners’ sugar; Green food coloring; 1 c. melted dark chocolate; 1 to 2 teaspoons black food coloring; Small candy googly eyes; Chocolate sprinkles (for hair); chocolate chips (for bolts)