Hot Fudge Pudding Cake | America's Test Kitchen

Ingredients

• 2 teaspoons instant coffee
• 1 1/2 cups water
• 2/3 cup Dutch-processed cocoa powder (2 1/2 ounces/71 grams)
• 1/3 cup brown sugar (packed, 1 3/4 ounces/50 grams)
• 1 cup granulated sugar (7 ounces/198 grams)
• 6 tablespoons unsalted butter
• 2 ounces (57 grams) semisweet chocolate or bittersweet chocolate, chopped
• 3/4 cup unbleached all-purpose flour (3 3/4 ounces/106 grams)
• 2 teaspoons baking powder
• 1 tablespoon vanilla extract
• 1/3 cup whole milk
• 1/4 teaspoon table salt
• 1 large egg yolk