Preheat your oven to 350°F (175°C). In a large mixing bowl, prepare the chocolate cupcake mix according to the package instructions. Grease your cupcake pans generously, omitting liners. Pour the batter evenly into each cup, filling them about two-thirds full, and bake for 18-20 minutes until a toothpick comes out clean.

After baking, remove the cupcake pans from the oven and let them cool in the pans for about 10 minutes. Gently transfer the cupcakes to a wire rack to cool completely—this will take another 20-30 minutes. Once cool, invert each cupcake and carve out a small hole in the bottom using a sharp knife for filling later.

In a microwave-safe bowl, melt 1 cup of chocolate chips until smooth, stirring every 30 seconds. In a separate bowl, beat the room temperature butter with an electric mixer until light and fluffy, about 3-5 minutes. Gradually add the sifted powdered sugar, mixing until fully combined, then add the melted chocolate and 2 teaspoons of vanilla extract, blending until creamy.

Melt the remaining chocolate chips until smooth, ensuring it’s cool enough to touch without burning. Dip each cupcake base into the melted chocolate, allowing any excess to drip off. Place them on a sheet of wax paper and let the chocolate harden, which usually takes about 15-20 minutes.

Once the chocolate coating has set, fill a quart-sized ziplock bag with your fluffy buttercream and snip a small corner off. Pipe the frosting generously around the tops of each cupcake, resembling cauldron edges.

Melt the remaining chocolate again and shape it into handle forms on wax paper. Freeze the handles for about 10 minutes until solid, and then carefully attach them to the sides of each cupcake.