Crunchy Chocolate Malt Cupcakes

INGREDIENTS

• 3 tablespoons unsalted butter
• 2/3 cup sugar
• 1 cup malted milk powder (such as Carnation)
• 7 ounces milk chocolate, chopped
• 4 ounces bittersweet chocolate, chopped
• 1 teaspoon light corn syrup
• 3 cups heavy cream
• 1 stick unsalted butter, at room temperature
• 1 1/3 cups sugar
• 1/2 teaspoon kosher salt
• 1 tablespoon baking powder
• 4 large eggs, at room temperature
• 2 cups all-purpose flour
• 1 1/2 cups crispy rice cereal
• 3/4 teaspoon fine salt
• 3/4 cup Dutch-process cocoa powder
• 1 3/4 cups half-and-half