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Preheat your oven to 350°F. Line a 6-cup muffin tin with paper liners. This recipe makes 4 cupcakes, so you'll have two empty spots; fill them halfway with water to ensure even baking.

In a large bowl, whisk together the all-purpose flour, granulated sugar, unsweetened cocoa powder, baking soda, and salt until well combined.

In a separate medium bowl, whisk together the large egg, milk, vegetable oil, and vanilla extract until smooth.

Pour the wet ingredients into the dry ingredients and mix with a spatula until just combined. Do not overmix. Gradually stir in the hot water until the batter is smooth and runny.

Divide the batter evenly among the 4 prepared cupcake liners, filling each about two-thirds full.

Bake for 16 to 18 minutes, or until a wooden skewer inserted into the center of a cupcake comes out clean. Let the cupcakes cool in the muffin tin for 5 minutes before transferring them to a wire rack to cool completely.

While the cupcakes cool, prepare the molten lava filling. In a microwave-safe bowl, combine the semi-sweet chocolate chips, heavy cream, and unsalted butter. Microwave in 30-second intervals, stirring after each, until smooth and melted. Stir in the vanilla extract. Let it cool slightly at room temperature, then refrigerate for 10-15 minutes until it thickens to a spoonable consistency.

Next, prepare the chocolate ganache frosting. In a microwave-safe bowl, combine the semi-sweet chocolate chips, heavy cream, and softened unsalted butter. Microwave in 30-second intervals, stirring after each, until smooth and glossy. Let it cool at room temperature for about 15-20 minutes, stirring occasionally, until it reaches a spreadable consistency.

Once the cupcakes are completely cool, use a small paring knife or a cupcake corer to carefully remove a cone-shaped center from each cupcake. Reserve the tops of the removed cores.

Spoon or pipe the molten lava filling into the cored cupcakes. Place the reserved cupcake tops back on to cover the filling.

Spread or pipe the chocolate ganache frosting generously over each cupcake. Immediately decorate with rainbow sprinkles before the ganache sets.

Serve immediately and enjoy the chocolate lava eruption!


Preheat your oven to 350°F. Line a 6-cup muffin tin with paper liners. This recipe makes 4 cupcakes, so you'll have two empty spots; fill them halfway with water to ensure even baking.

In a large bowl, whisk together the all-purpose flour, granulated sugar, unsweetened cocoa powder, baking soda, and salt until well combined.

In a separate medium bowl, whisk together the large egg, milk, vegetable oil, and vanilla extract until smooth.

Pour the wet ingredients into the dry ingredients and mix with a spatula until just combined. Do not overmix. Gradually stir in the hot water until the batter is smooth and runny.

Divide the batter evenly among the 4 prepared cupcake liners, filling each about two-thirds full.

Bake for 16 to 18 minutes, or until a wooden skewer inserted into the center of a cupcake comes out clean. Let the cupcakes cool in the muffin tin for 5 minutes before transferring them to a wire rack to cool completely.

While the cupcakes cool, prepare the molten lava filling. In a microwave-safe bowl, combine the semi-sweet chocolate chips, heavy cream, and unsalted butter. Microwave in 30-second intervals, stirring after each, until smooth and melted. Stir in the vanilla extract. Let it cool slightly at room temperature, then refrigerate for 10-15 minutes until it thickens to a spoonable consistency.

Next, prepare the chocolate ganache frosting. In a microwave-safe bowl, combine the semi-sweet chocolate chips, heavy cream, and softened unsalted butter. Microwave in 30-second intervals, stirring after each, until smooth and glossy. Let it cool at room temperature for about 15-20 minutes, stirring occasionally, until it reaches a spreadable consistency.

Once the cupcakes are completely cool, use a small paring knife or a cupcake corer to carefully remove a cone-shaped center from each cupcake. Reserve the tops of the removed cores.

Spoon or pipe the molten lava filling into the cored cupcakes. Place the reserved cupcake tops back on to cover the filling.

Spread or pipe the chocolate ganache frosting generously over each cupcake. Immediately decorate with rainbow sprinkles before the ganache sets.

Serve immediately and enjoy the chocolate lava eruption!
