Hot Fudge Pudding Cake

Step 1
Preheat oven to 350 degrees F (175 degrees C).

Step 2
Grease a 9×9-inch baking pan.

Step 3
Whisk together flour, baking powder, white sugar, 2 tablespoon cocoa powder, and salt in a large bowl.

Step 4
Stir in milk and butter until smooth.

Step 5
Fold in walnuts until just combined.

Step 6
Spread batter evenly in the prepared baking pan.

Step 7
Mix 1/4 cup cocoa and brown sugar in a small bowl; sprinkle mixture on top of the batter.

Step 8
Pour hot water over the batter.

Step 9
Bake in the preheated oven until the center of the cake is almost set, about 45 minutes. Brown sugar, cocoa, and hot water will combine to form a chocolate sauce that will settle to the bottom of the cake during baking.

Step 10
Best served warm.