Hot Chocolate Sundae Cake
Prep time
Cook time
Total time
Hot Chocolate Sundae Cake - This ultra decadent chocolate cake magically creates it's own hot chocolate sauce as it bakes! Top it off with a generous dollop of Reddi-wip, it's even better than warming up to a mug of hot chocolate!
Recipe type: Dessert
Cuisine: American
Serves: 10 servings
  • ¾ c. granulated sugar
  • ¼ c. baking cocoa
  • 1 c. flour
  • 2 tsp. baking powder
  • ¼ tsp salt
  • ½ c. milk
  • 4 T. butter, melted
  • 1 egg yolk
  • 2 tsp. vanilla
  • ½ c. semi-sweet chocolate chips
  • ½ c. marshmallows
  • ⅓ c. brown sugar
  • 4 pkgs. Swiss Miss Hot Cocoa Envelops ((marshmallow lovers flavor is good))
  • 1 c. hottest tap water
  • 1 can Reddi-wip
  1. Preheat oven to 350 degrees. Spray an 9”x9” pan with nonstick spray.
  2. To a medium sized mixing bowl add granulated sugar, ¼ cup of baking cocoa, flour, baking powder, and salt. Stir until combined.
  3. To a separate bowl add milk, melted butter, egg yolk, and vanilla. Whisk until combined.
  4. Pour milk mixture into the flour mixture. Stir until well combined. Batter will be thick. Add chocolate chips and marshmallows to the cake batter and stir to incorporate. Place cake batter in prepared 9”x9” pan and spread to edges.
  5. I used to the same bowl used to make the cake batter in for this next step. Add brown sugar and 2 packages Swiss Miss Hot Chocolate envelopes to bowl and mix. Sprinkle brown sugar mixture evenly over the top of cake. Do not stir.
  6. Measure 1 cup hottest tap water into a measuring cup. Add remaining two envelopes of Swiss Miss Hot Cocoa to water and stir until combined. Pour Swiss Miss hot chocolate over the top of the cake. DO NOT STIR.
  7. Bake cake for 22-24 minutes. The cake will look a little underdone and that’s exactly how it should look. Marshmallows should be golden brown.
  8. Cool cake for 10 minutes. Serve warm with a generous amount of Reddi-wip topping.
Recipe by Little Dairy On the Prairie at