For the Butter/Sugar Coating:

• 2 tablespoons salted butter, softened
• 2 tablespoons granulated sugar
• 1 tablespoon cocoa powder

For the Cakes:

• ½ cup plus 2 tablespoons all-purpose flour
• ⅔ cup (57 g) natural unsweetened cocoa powder
• 1 ½ teaspoons baking powder
• ¼ teaspoon salt
• ¼ cup (57 g) salted butter, softened
• ⅔ cup (141 g) granulated sugar
• ⅔ cup (141 g) lightly packed brown sugar
• 4 large eggs
• 1 ½ teaspoons vanilla extract
• ⅓ cup (57 g) finely chopped semisweet or bittersweet chocolate

For Garnish:

• Powdered sugar for sprinkling
• Warm strawberry or raspberry jam for drizzling
• Ice cream for serving

• In a small bowl, combine and mash together the softened butter, granulated sugar, and cocoa powder (for the butter/sugar coating) until thoroughly mixed. Using a pastry brush or even your fingertips (it works wonderfully!), evenly rub this rich mixture into the bottom and up the sides of 10 (4-ounce) ramekins. If you don’t have ramekins, check the notes section for alternative dish options. Set these prepared ramekins aside.
• For the cake batter, in a separate medium bowl, whisk together the all-purpose flour, natural unsweetened cocoa powder, baking powder, and salt. Ensure these dry ingredients are well combined to prevent lumps in the final batter.
• In another medium bowl, using a handheld electric mixer or a stand mixer with the paddle attachment, beat the softened butter until it’s light and creamy, which should take about 1-2 minutes. Next, add both the granulated sugar and the brown sugar. Continue beating on medium-high speed for a full 4-5 minutes. This creaming process is crucial for incorporating air and creating a light, tender cake crumb.
• Add the eggs one at a time, beating well after each addition. Then, stir in the vanilla extract. Continue to mix until the mixture becomes pale in color and thick in consistency, approximately 4 minutes. It’s important not to rush or shorten these mixing times; they are essential for achieving an airy and moist cake texture. Finally, gently fold the dry flour mixture into the wet ingredients until no dry streaks remain. Stir in the finely chopped semisweet or bittersweet chocolate.
• Carefully divide the prepared batter evenly among the coated ramekins. If you’re using a muffin tin, distribute the batter accordingly (refer to the note section for guidance on using muffin tins). Lightly cover the filled dishes with plastic wrap. A handy tip for ramekins: place them all on a sheet pan and cover with a single sheet of plastic wrap instead of individually wrapping each. Refrigerate the cakes for a minimum of 4 hours, or up to 2 days. This refrigeration step is key for ensuring the molten fudge center holds its luscious texture during baking.
• When ready to bake, preheat your oven to 350 degrees F (175 degrees C). Remove the chilled cakes from the refrigerator and let them sit at room temperature for about 10 minutes while the oven preheats. This slight warming helps promote even baking.
• Remove the plastic wrap from the cakes and place them in the preheated oven. Bake for 14-15 minutes. If you are using muffin tins, they may require slightly less baking time, around 12-14 minutes. The cakes are perfectly done when their edges appear puffy and the tops are slightly crusty, while the center remains delightfully soft and molten.
• Serve these beauties immediately! For a classic presentation, dust them with a generous sprinkling of powdered sugar. Enhance the experience further with a scoop of your favorite ice cream or a luscious drizzle of warm strawberry or raspberry jam. The contrast of warm cake and cool toppings is simply divine.
• If you’ve used ramekins, these cakes are perfectly enjoyable served straight from the dish. However, for a more elegant presentation, you can carefully invert them onto a serving plate. If you opted for a muffin tin, you’ll definitely want to unmold them unless you prefer a casual, family-style approach where everyone digs in with spoons around the pan! To turn them out from a muffin tin, lay a piece of greased parchment paper (greased-side up) onto a baking sheet or cooling rack. Place this over the muffin tin so the greased side of the parchment is on top of the cakes. Then, holding the baking sheet/rack and muffin tin firmly together, swiftly flip them over. The cakes should fall out neatly onto the parchment paper. From there, they can be easily scooped with a spatula onto individual plates or into small serving bowls. Remember, if the parchment isn’t greased, the cakes may stick.

The Advantage of Planning Ahead: Remember, these pre-baked cakes require a minimum of 4 hours of refrigeration. This crucial step ensures the center stays perfectly molten and fudge-like during baking. The excellent news is that you can prepare the batter and refrigerate the cakes for up to two days in advance. This makes them an ideal make-ahead dessert, perfect for busy hosts or when you simply want to enjoy a fresh-baked treat without the last-minute rush.

Serving for Optimal Enjoyment: For the ultimate experience, these delightful cakes should be served immediately once they come out of the oven. If left to cool for an extended period, the warm, molten fudge center will begin to solidify, and the tender edges of the cake won’t be quite as soft and yielding. Timely serving guarantees every bite is pure perfection.