S'mores Lava Cakes

• unsalted butter, plus more for greasingl↗1⁄2 cup
• sugar, plus more for coating↗1⁄4 cup
• bittersweet chocolate, chopped↗4 ounces
• large eggs, at room temperature↗2
• large egg yolks, at room temperature↗2
• flour↗1 tablespoon
• heavy cream↗3 tablespoons
• marshmallow cream2⁄3 cup
• squares graham crackers, finely chopped2

Step-by-step instructions

1. 1

   Preheat the oven to 425°. Grease four 6-ounce custard cups, then coat with sugar; place on a baking sheet. In a medium bowl, microwave the butter and chocolate at medium power for 2 minutes; stir until smooth.

2. 2

   In a medium bowl, whisk together the eggs, egg yolks and sugar until foamy. Whisk in the chocolate mixture, then the flour. Fill the prepared custard cups two-thirds full with the batter. Bake until the edges are puffy, 13 to 15 minutes.

3. 3

   Meanwhile, in a medium bowl, microwave the heavy cream at high power for 30 seconds. Stir in the marshmallow cream until smooth.

4. 4

   Carefully invert the cakes onto plates and drizzle the marshmallow sauce on the side. Top with the graham cracker crumbs.