Grandma’s Hot Fudge Sundae Cake

Delicious chocolate cake that makes its own hot fudge sauce while it bakes, right in the pan! This is amazing served with any flavour of ice cream: mint, vanilla, chocolate, strawberry -- you name it!
Course Dessert
Cuisine American
Prep Time 10 minutes
Cook Time 30 minutes
Total Time 40 minutes
Servings 8 servings
Calories 271kcal
Author Ashley Fehr


  • 1 cup whole wheat flour or sub all-purpose
  • 3/4 cup sugar
  • 2 tbsp + 1/4 cup unsweetened cocoa powder divided
  • 2 tsp baking powder
  • 1/4 tsp salt
  • 1/2 cup milk
  • 2 tbsp oil
  • 1 tsp vanilla
  • 1 cup packed brown sugar
  • 1 3/4 cup hot water


  • Preheat oven to 350 degrees F.
  • In a medium bowl, combine flour, sugar, 2 tbsp cocoa, baking powder, salt, milk, oil and vanilla. Batter will be very thick -- don't fear. You might need to stir with a metal spoon.
  • Spread batter into a greased 9" pie plate or square pan (*Note: make sure your pan has tall sides, otherwise your cake might run over a bit.)
  • Combine brown sugar and ¼ cup cocoa. Spread over batter.
  • Top with hot water (I use freshly boiled). Bake for about 30-35 minutes until top is dry and puffed. (*Note: put a cookie sheet underneath your pan in the oven, just in case a little spills over).
  • Serve warm with ice cream.


Calories: 271kcal | Carbohydrates: 57g | Protein: 2g | Fat: 4g | Cholesterol: 1mg | Sodium: 91mg | Potassium: 237mg | Fiber: 1g | Sugar: 46g | Vitamin A: 25IU | Calcium: 101mg | Iron: 0.8mg