This butterscotch cake is made with moist and tender brown sugar cake layers, homemade butterscotch sauce, and topped and filled with butterscotch buttercream.
INGREDIENTS
- 150 g Butter
- 1 ½ cups Dark brown sugar
- ½ teaspoon Kosher salt
- 4 Eggs
- 2 teaspoon Vinegar
- ⅓ cup Sour cream
- ¼ cup Vegetable oil
- 1 teaspoon Vanilla extract
- 3 cups Flour
- 2 teaspoon Baking powder
- 1 Baking soda
- 1 cup Buttermilk
Butterscotch sauce
- 115 g Butter
- 1 teaspoon Vanilla extract
- ½ teaspoon Kosher salt
- ¾ cup Heavy cream
- 1 ⅓ cup Dark brown sugar
Butterscotch buttercream
- 350 g Butter soften
- 4 ½ cups Powder sugar
- 1 teaspoon Vanilla extract
- 4 tablespoon Milk
- ½ teaspoon Kosher salt
- ¼ cup Butterscotch sauce
INSTRUCTIONS
Make the butterscotch sauce
- Into a saucepan, add all the butter, dark brown sugar, vanilla extract, kosher salt, and heavy cream, and melt them over medium-high mixing constantly until the sugar and butter melts.
- Bring it to a simmer, and simmer for about 3 minutes until the mixture thickens. Remove from heat and set it aside to cool.
Make the cake
- Into a large mixing bowl, add the softened butter, dark brown sugar, and kosher salt. Mix with an electric hand mixer until well combined.
- Add the eggs, and mix until well combined and the mixture is smooth.
- Add the sour cream, oil, vanilla extract, and vinegar. Mix well until combined.
- Add the ½ of flour, and add the baking powder and baking soda, add ½ of the buttermilk and mix until almost combined.
- Add the rest of the flour and buttermilk. Mix until just combined. Do not overmix this.
- Divide the batter into 3 8-inch baking pans and bake in a 180c (350f) preheated oven for about 25-30 minutes (depending on your oven) or until a toothpick is inserted into the cake and comes out clean.
- Let the cakes cool to room temperature and remove them from the pans.
Make the buttercream
- Into a big mixing bowl, add the room temperature butter, salt, powder sugar, vanilla extract, cooled butterscotch, and milk. Mix with an electric hand mixer for a few minutes until the buttercream is light in color and creamy.
Assembly
- Pipe a small dollop of the buttercream on the surface that you will frost on. Lay the first cake layer over the frosting dot.
- Top the first cake layer with ⅓ of the buttercream and spread an even layer of the buttercream with a spatula.
- Drizzle about 2 tablespoon of the butterscotch sauce and spread it with a spoon.
- Top the cake with the second cake layer. Repeat adding the buttercream and butterscotch sauce and top with the third cake layer.
- Frost the cake with the remaining buttercream and pour the rest of the butterscotch sauce over the cake. Smooth it out with a spatula, creating a marble effect.
- This cake is best served at room temperature for the best texture.

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