Stacked squares of glazed chocolate cake on metal square pan

Gooey Chocolate Sheet Cake

  • Author: Paula Montenegro
  • Prep Time: 20
  • Cook Time: 20
  • Total Time: 40 minutes
  • Yield: 12 servings 1x
  • Category: Cakes
  • Method: Baking
  • Cuisine: American


Easy to make, and with a great chocolate flavor, this cake is amazing! The top layer remains gooey and rather soft,  so I prefer to serve the cake directly from the pan.



  • 1 ¼ cups butter
  • ½ cup + 2 Tbs cocoa
  • 1 cup water
  • 2 cups unsifted flour
  • 1 ½ cups firmly packed brown sugar
  • 1 teaspoon baking soda
  • 1 teaspoon cinnamon
  • ½ teaspoon salt
  • 1 14 oz can condensed milk
  • 2 eggs
  • 1 teaspoon vanilla extract
  • 1 cup confectioners' sugar


  1. Preheat oven to 350º.
  2. Grease a 13x18-inch pan and line bottom with foil if desired.
  3. In a small saucepan melt 1 cup butter. Add cocoa and water and bring to a boil. Remove from heat.
  4. In a large bowl mix flour, brown sugar, baking soda, cinnamon, and salt.
  5. Make a well in the center and add cocoa mixture, 1/3 can of condensed milk, eggs and vanilla. Mix until the batter is smooth.
  6. Pour into prepared pan and bake for about 15 to 20 minutes, until cake springs back.
  7. In a small saucepan (I use the same one) melt remaining ¼ cup butter.
  8. Remove from heat and add 2 Tbs cocoa, and rest of condensed milk. Mix well.
  9. Add powdered sugar and walnuts.
  10. Spread over warm chocolate cake. Let cool completely.


  • Cake pan: I use a rectangular pan without a removable bottom. This is because when you pour the frosting some of it goes to the sides. If it had a removable bottom it would probably seep through it.
  • Variation - you can make a poke cake, piercing the surface when the cake comes out of the oven with a brochette stick or similar. When you pour the chocolate icing some of it will seep into it making the cake moister.
  • Fudgier cake: if you slightly underbake the cake it will be fudgier. And it will be even more amazing!
  • Walnuts: sometimes I sprinkle chopped walnuts on top of the icing before it sets.

Keywords: chocolate sheet cake