Gluten-Free Sweet Potato Spice Cake With Cream Cheese Frosting

• For the cake:
• 1 1/4 cups flavorless vegetable oil (such as soybean, corn, or safflower)
• 2 cups (400 grams) sugar
• 4 large eggs
• 1 1/2 cups plus 1 tablespoon (240 grams) white rice flour or 2 1/3 cups (240 grams) Thai white rice flour
• 3/4 cup plus 1 tablespoon (80 grams) oat flour
• 1 teaspoon baking soda
• 2 teaspoons baking powder
• 2 teaspoons ground cinnamon
• 1/2 teaspoon ground nutmeg
• 1/4 teaspoon ground cloves
• 1/2 teaspoon salt
• 3 cups (340 grams) lightly packed peeled and shredded sweet potatoes
• 1 cup (100 grams) coarsely chopped walnuts
• Cream Cheese Frosting (recipe below)
• For the cream cheese frosting:
• 8 ounces (225 grams) cream cheese
• 8 tablespoons (1 stick/115 grams) unsalted butter
• 1 1/2 cups (170 grams) confectioners' sugar
• 1/2 teaspoon pure vanilla extract

1. Position a rack in the lower third of the oven and preheat the oven to 350u0b0 F. Grease a 9- by 13-inch glass baking dish with vegetable oil spray or butter.
2. Combine the oil, sugar, and eggs in the bowl of a stand mixer and beat on medium speed with the paddle attachment until lighter in color, about 2 minutes. Or beat with a handheld mixer on medium-high for 3 to 4 minutes.
3. Add the rice and oat flours, baking soda, baking powder, cinnamon, nutmeg, cloves, salt, sweet potatoes, and walnuts and beat on low speed until smooth. Scrape the batter into the prepared dish.
4. Bake for 30 minutes at 350u0b0 F, then reduce the heat to 325u0b0 F and bake for 30 minutes longer, or until a toothpick inserted in the center comes out clean. Set the pan on a rack to cool for at least 2 hours before frosting.
5. To frost, use a spoon or drop dollops of frosting all over the cake, ten spread with a small spatula. Cut into 3-inch squares to serve.
6. This cake keeps, covered, in the refrigerator for up to 5 days.
7. Note: To make this into a layer cake, grease the sides of two 9- by 2-inch round cake pans and line the bottoms with parchment paper. Divide the batter evenly between the pans. Bake for 30 minutes at 350u0b0 F and 20 minutes at 325u0b0 F. Fill and frost the cake with 1 1/2 batches of the Cream Cheese Frosting.
8. Warm the cream cheese and butter in a microwave oven on low until soft but not melted.
9. Add the confectioners' sugar and vanilla and beat with a spoon until smooth.

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Taken from food52.com/recipes/39064-gluten-free-sweet-potato-spice-cake-with-cream-cheese-frosting (may not work)