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Sweet Potato Cake with Marshmallow Icing

November 05, 2019

Sweet Potato Cake with Marshmallow Icing

INGREDIENTS

For the Sweet Potato Cake - makes 3 8” layers or 2 10” layers

  • 3 cups all-purpose flour
  • 1 ½ teaspoons baking powder
  • 1 ½ teaspoons baking soda
  • 1 ½ teaspoons salt
  • 1 tablespoon cinnamon
  • 1 ½ cups butter, melted and browned, bits included
  • 1 ¾ cups granulated sugar
  • 1 ¼ cup packed light brown sugar
  • 6 eggs, lightly beaten
  • 2 teaspoons vanilla bean paste or vanilla extract
  • 22 ounces sweet potato puree - either canned or fresh baked

For the Marshmallow Buttercream:

  • 1 cup unsalted butter, softened
  • ½ cup salted butter, softened
  • 16 ounces marshmallow fluff
  • 4 cups confectioners’ sugar
  • 2 tablespoons milk

For the Maple Drip Glaze:

  • 1 cup confectioners’ sugar
  • 4 teaspoons milk
  • ½ teaspoon maple extract
  • ¼ teaspoon cinnamon
  • 2 teaspoons light corn syrup, optional

INSTRUCTIONS

Make the Sweet Potato Cake:

  1. Preheat oven to 350. Butter and lightly flour three 8″ round pans. Line with parchment paper circles.
  2. Melt butter in saucepan over medium heat. Cook, swirling occasionally, until butter turns brown. Remove from heat and let cool.
  3. Sift together flour, baking powder, baking soda, salt and cinnamon.
  4. In large bowl combine browned butter (including any brown bits on the bottom of pan), granulated sugar, brown sugar, eggs and vanilla bean paste.  Whisk until combined.
  5. Whisk in dry ingredients, adding in two batches.
  6. Add sweet potato puree and mix well.
  7. Divide batter evenly between the three 8″ round pans.
  8. Bake for 32-36 minutes, until toothpick inserted into center comes out clean.
  9. Let cool in pans for 10 minutes, then remove to wire rack to finish cooling.

Make the Marshmallow Buttercream:

  1. In the bowl of a stand mixer, beat butter and marshmallow fluff on medium speed for 2 minutes until creamy.
  2. Add in confectioner’s sugar 1 cup at a time, mixing and scraping bowl as necessary.
  3. Add milk and continue to mix on medium speed 3-4 minutes until fluffy.

Make the Maple Glaze:

  1. Combine all ingredients in a small bowl. Whisk until smooth. Use immediately.

Assemble the Cake:

  1. Once the cakes have cooled, trim off the top so that they are level.
  2. Place one layer of cake onto serving plate or cake stand and top with one cup of marshmallow frosting.  Repeat with second cake layer, more frosting and then last layer of cake.
  3. Crumb coat cake and refrigerate 10 minutes until set. Frost the cake and smooth the sides and top, reserving about ½ cup frosting, for garnish. Using the tip of a spatula, create swirls on sides, if desired.
  4. Make glaze and drizzle over the top with small drips overflowing the edge. 
  5. Using a tip of your choice pipe dollops of frosting on top of the set glaze, sporadically but in a circular form.
  6. Sprinkle with chopped pecans (fresh or candied) and a light dusting of cinnamon to finish.

NOTES

Maple glaze should be thick yet pourable so that it flows down the side of your cake with a little resistance. Unsure if your glaze is the right consistency? Set a small bowl upside down on a larger plate and do a test drizzle onto the bowl. If it is too thick and doesn’t drip down the side, even with some assistance, add a few more drops of milk to loosen the glaze. If it is too thin and runs right off the side of the bowl and pools onto the plate beneath, add a little more confectioners’s sugar to thicken the glaze. Maple glaze should be used right after whisking, as it will harden as it dries. If needed, cover bowl of prepared glaze with a damp paper towel to prevent it from setting. Whisk again before using.






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