Ingredients:
1 cup of sugar
½ cup of cocoa powder
1 cup all-purpose flour
2 teaspoons baking powder
¼ teaspoon salt
½ cup milk
4 tablespoons butter, melted
1 large egg yolk
2 teaspoons vanilla extract
½ cup semisweet chocolate chips
1 cup boiling water
Instructions:
1-Preheat oven to 350 degrees F. Sprays an 8-inch square baking pan with cooking spray.
Whisk ½ cup sugar with ¼ cup cocoa powder and set aside.
2-Whisk the flour, remaining ½ cup sugar, remaining ¼ cup cocoa, baking powder, and salt in a large bowl.
Whisk milk, butter, egg yolk, and vanilla in a medium bowl until smooth.
Stir milk mixture into flour mixture until just combined.
Fold in chocolate chips (batter will be stiff).
3-Using a rubber spatula, scrape batter into prepared pan and spread into corners.
Sprinkle reserved cocoa and sugar mixture evenly over the top.
Gently pour boiling water over cocoa.
Do not stir.
4-Bake until the top of the cake is cracked, the sauce is bubbling and a toothpick inserted into the cakey area comes out mostly clean, about 22-24 minutes.
Cool on a rack for at least 10 minutes.
Serve warm with vanilla ice cream.
