1/2 tsp baking soda
1/2 tsp salt
1 tsp ground cinnamon
1/2 tsp ground nutmeg
1/2 tsp ground ginger
For the Cinnamon Swirl:
1/2 cup granulated sugar
1 tbsp ground cinnamon
For the Glaze:
1 cup powdered sugar
2 tbsp milk
1/2 tsp vanilla extract
Directions:
Preheat Oven:
Preheat your oven to 350°F (175°C). Grease and flour a 9×13-inch baking pan.
Prepare the Cake Batter:
In a large bowl, whisk together the mashed sweet potatoes, granulated sugar, brown sugar, vegetable oil, eggs, buttermilk, and vanilla extract until smooth and well combined.
In a separate bowl, sift together the flour, baking powder, baking soda, salt, cinnamon, nutmeg, and ginger.
Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
Add the Cinnamon Swirl:
In a small bowl, mix together the granulated sugar and ground cinnamon.
Pour half of the cake batter into the prepared baking pan. Sprinkle half of the cinnamon-sugar mixture evenly over the batter.
Spoon the remaining batter over the cinnamon-sugar layer and gently swirl with a knife or toothpick to create a marble effect. Sprinkle the remaining cinnamon-sugar mixture on top.
Bake the Cake:
Bake in the preheated oven for 35-40 minutes, or until a toothpick inserted into the center comes out clean.
Allow the cake to cool completely in the pan on a wire rack.
Prepare the Glaze:
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