Ingredients
Equipment
Method
- Bake the Cupcakes

- Preheat the oven to 350°F (175°C). Line a 12-cup muffin tin with black cupcake liners. Toss the mini chocolate chips with the 1 tablespoon of flour in a small bowl and set aside.
- In a large bowl, whisk together the 1 1/2 cups (190 g) flour, sugar, cocoa powder, baking soda, baking powder, and salt. In a separate bowl, whisk the eggs, buttermilk, oil, and vanilla until smooth.

- Pour the wet ingredients into the dry ingredients and whisk until just combined. Slowly stir in the hot coffee until the batter is smooth and thin. Fold in the floured chocolate chips.
- Divide the batter among the liners, filling each about two-thirds full. Bake for 18 to 22 minutes, until a toothpick inserted into the center comes out with a few moist crumbs. Cool in the pan for 5 minutes, then transfer to a wire rack and cool completely, about 30 minutes.

- Make the Buttercream
- In a large bowl, beat the butter on medium-high speed for 3 minutes, until pale and creamy. Add the powdered sugar a cup at a time, beating on low until combined, then increase the speed.

- Beat in the lime juice, lime zest, vanilla, and salt. Add the heavy cream a tablespoon at a time until the frosting is fluffy and holds peaks. Beat in the green gel food coloring, a little at a time, until bright lime green, then beat for 2 minutes more.
- Decorate the Cauldrons

- Transfer the buttercream to a piping bag fitted with a large round or star tip. Pipe a tall, bubbly swirl or mound of frosting on top of each cooled cupcake, so it looks like bubbling potion overflowing from the cauldron.
- Scatter the green sugar pearls over the frosting to look like bubbles. Press a piece of licorice lace into each side of the cupcake, forming a handle, if desired. Serve at room temperature.

Notes
Thin batter: This batter is meant to be thin. It bakes into a very moist, tender cupcake.
Floured chips: Tossing the chips with flour keeps them from sinking to the bottom of the liners.
Buttermilk substitute: Stir 2 1/4 teaspoons of lemon juice or white vinegar into 3/4 cup (180 ml) of whole milk and let it stand for 5 minutes.
Coffee: The hot coffee deepens the chocolate flavor without a coffee taste. Hot water works just as well.
Green color: Use gel food coloring for a vivid color without thinning the frosting. The color deepens over 30 minutes, so start light.
Lime flavor: Add the lime juice a little at a time. If the frosting looks curdled, beat in 1/2 cup (60 g) more powdered sugar.
Bubbles: For extra bubbling effect, use green candy pearls, mint-green gumballs, or crushed green hard candies. Add them just before serving.
Allergies: This recipe contains wheat, eggs, and dairy. Check labels on sprinkles and licorice.
Storage: Store frosted cupcakes in an airtight container in the refrigerator for up to 4 days. Bring to room temperature before serving. Unfrosted cupcakes freeze well for up to 2 months. Nutrition (per cupcake) Calories 465 kcal Carbohydrates 62 g Protein 4 g Fat 24 g Saturated fat 12 g Cholesterol 65 mg Sodium 190 mg Potassium 180 mg Fiber 2 g Sugar 50 g
Floured chips: Tossing the chips with flour keeps them from sinking to the bottom of the liners.
Buttermilk substitute: Stir 2 1/4 teaspoons of lemon juice or white vinegar into 3/4 cup (180 ml) of whole milk and let it stand for 5 minutes.
Coffee: The hot coffee deepens the chocolate flavor without a coffee taste. Hot water works just as well.
Green color: Use gel food coloring for a vivid color without thinning the frosting. The color deepens over 30 minutes, so start light.
Lime flavor: Add the lime juice a little at a time. If the frosting looks curdled, beat in 1/2 cup (60 g) more powdered sugar.
Bubbles: For extra bubbling effect, use green candy pearls, mint-green gumballs, or crushed green hard candies. Add them just before serving.
Allergies: This recipe contains wheat, eggs, and dairy. Check labels on sprinkles and licorice.
Storage: Store frosted cupcakes in an airtight container in the refrigerator for up to 4 days. Bring to room temperature before serving. Unfrosted cupcakes freeze well for up to 2 months. Nutrition (per cupcake) Calories 465 kcal Carbohydrates 62 g Protein 4 g Fat 24 g Saturated fat 12 g Cholesterol 65 mg Sodium 190 mg Potassium 180 mg Fiber 2 g Sugar 50 g
