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Grandma’s Sweet Potato Butter Cake: A Southern Classic Reimagined

Grandma’s Sweet Potato Butter Cake: A Southern Classic Reimagined

calendar_today October 7, 2026 schedule 4 min read
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Prep
20 minutes
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Cook
35 minutes
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Rest
10 minutes
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Cool
30 minutes
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Servings
12
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Calories
280 kcal

Experience the heartwarming taste of Grandma's Sweet Potato Butter Cake! This easy-to-make cake combines the sweetness of sweet potatoes with the rich flavor of butter and warm spices. Perfect for a comforting dessert any time of year, it's a slice of Southern charm in every bite. The moist crumb and aromatic spices make it irresistible!

restaurant_menu Ingredients format_list_numbered Instructions

restaurant_menu Ingredients

Servings
12

Cake Ingredients

hardware Essential Tools

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9x13 inch baking pan

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Large mixing bowl

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Stand mixer or hand mixer

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Whisk

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Measuring cups and spoons

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Rubber spatula

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Wire cooling rack

format_list_numbered Preparation

Instructions

1

Preheat your oven to 350°F (175°C) and grease a 9x13 inch baking pan.

2

In a large mixing bowl, cream together the softened butter and granulated sugar until light and fluffy. This usually takes 3-5 minutes with a mixer on medium speed.

3

Beat in the eggs one at a time, ensuring each egg is fully incorporated before adding the next. Stir in the vanilla extract and mashed sweet potatoes until the mixture is smooth and well combined.

4

In a separate bowl, whisk together the all-purpose flour, baking powder, baking soda, ground cinnamon, ground nutmeg, and kosher salt. This ensures even distribution of the leavening agents and spices.

5

Gradually add the dry ingredients to the wet ingredients, alternating with the buttermilk, beginning and ending with the dry ingredients. Mix until just combined, being careful not to overmix.

6

Pour the batter into the prepared baking pan and spread evenly.

7

Bake in the preheated oven for 30-35 minutes, or until a toothpick inserted into the center comes out clean.

8

Let the cake cool in the pan for 10 minutes before transferring it to a wire rack to cool completely.

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Try These Variations

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Spice Cake Upgrade

Enhance the warm spice profile by adding 1/4 teaspoon of ground cloves or allspice to the dry ingredients. This will deepen the flavor and add an extra layer of complexity, especially welcome during the holiday season. For a more intense spice flavor, consider using a high-quality cinnamon, such as Saigon cinnamon, known for its robust and aromatic qualities. This variation pairs exceptionally well with a cream cheese frosting.

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Brown Butter Bliss

Elevate the cake’s richness by browning the butter before creaming it with the sugar. Browning the butter involves melting it in a saucepan over medium heat until it turns a nutty brown color and emits a fragrant aroma. Let it cool slightly before using it in the recipe. The browned butter adds a depth of flavor that complements the sweet potatoes beautifully, creating a sophisticated twist on the classic cake.

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Citrus Zest Infusion

Brighten the cake’s flavor by adding the zest of one orange or lemon to the batter along with the vanilla extract. The citrus zest adds a refreshing note that balances the sweetness and complements the warm spices. Ensure that you only zest the outer layer of the citrus fruit, avoiding the bitter white pith underneath. This variation is particularly delightful in the springtime.

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Nutty Crunch Delight

Incorporate a delightful crunch by adding 1/2 cup of chopped pecans or walnuts to the batter. Toast the nuts lightly before adding them to enhance their flavor. You can also sprinkle some nuts on top of the cake before baking for a beautiful presentation and added texture. This variation adds a satisfying textural contrast to the moist and tender cake.

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Maple Glaze Magic

Drizzle a luscious maple glaze over the cooled cake for an extra touch of sweetness and flavor. To make the glaze, whisk together 1 cup of powdered sugar, 2-3 tablespoons of maple syrup, and 1 tablespoon of milk until smooth. Adjust the amount of milk to achieve the desired consistency. The maple glaze complements the sweet potatoes and warm spices perfectly, creating an irresistible treat.

Chef's Pro Tips

1

Use Freshly Grated Spices

For the most intense flavor, use freshly grated nutmeg and cinnamon. The pre-ground spices tend to lose their potency over time, so grating them fresh will make a noticeable difference in the cake’s flavor. I like to keep whole nutmegs and cinnamon sticks on hand for this purpose. A microplane grater works wonders for grating spices.

2

Don’t Overbake the Cake

Overbaking can result in a dry and crumbly cake. To prevent this, start checking the cake for doneness a few minutes before the recommended baking time. A toothpick inserted into the center should come out clean or with just a few moist crumbs attached. The cake should also be golden brown and slightly springy to the touch.

3

Cool the Cake Completely Before Frosting

If you plan to frost the cake, make sure it is completely cool before applying the frosting. Otherwise, the frosting will melt and slide off. To speed up the cooling process, you can place the cake in the refrigerator for a short period of time. However, be careful not to let it dry out.

Storage Guide

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Room Temperature

To store leftover Sweet Potato Butter Cake at room temperature, wrap it tightly in plastic wrap or place it in an airtight container. This will help to prevent it from drying out. The cake will keep at room temperature for up to 3 days. Ensure the cake is stored in a cool, dry place away from direct sunlight or heat sources.

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Refrigerator

For longer storage, you can refrigerate the cake. Wrap it tightly in plastic wrap or place it in an airtight container. The cake will keep in the refrigerator for up to 5 days. Refrigeration can sometimes dry out the cake slightly, so it’s important to wrap it well. Before serving, allow the cake to come to room temperature for about 30 minutes to enhance its flavor and texture.

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Freezer

To freeze the cake, wrap it tightly in plastic wrap and then in foil to prevent freezer burn. The cake will keep in the freezer for up to 2 months. When ready to serve, thaw the cake overnight in the refrigerator. You can also freeze individual slices for easy portioning. Frozen cake can be reheated in a low oven (300°F/150°C) for about 10-15 minutes, or until warmed through. Proper wrapping is crucial to prevent freezer burn and maintain the cake’s quality.

Avoid These Mistakes

✕ Using Cold Butter

One of the most common mistakes is using butter that is too cold. Cold butter won’t cream properly with the sugar, resulting in a dense and uneven cake. The butter should be softened but not melted. To soften butter quickly, you can cut it into small pieces and let it sit at room temperature for about 30 minutes, or microwave it in short intervals, being careful not to melt it.

✕ Overmixing the Batter

Overmixing the batter develops the gluten in the flour, which can lead to a tough and chewy cake. Mix the dry and wet ingredients just until combined. A few streaks of flour are okay – they’ll disappear during baking. Use a light hand and avoid using the mixer on high speed.

✕ Not Measuring Ingredients Accurately

Baking is a science, and accurate measurements are essential for success. Use measuring cups and spoons designed for baking, and level off the ingredients carefully. Avoid scooping flour directly from the bag, as this can pack it down and result in too much flour in the batter. Instead, spoon the flour into the measuring cup and level it off with a knife.

nutrition Nutrition Facts

Per serving: 1 slice

280 kcal Calories
4g Protein
40g Carbohydrates
12g Fat
7g Saturated Fat
70mg Cholesterol
200mg Sodium
2g Fiber
25g Sugar

Nutritional information is an estimate and may vary based on specific ingredients and portion sizes.

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Frequently Asked Questions

Can I reduce the amount of sugar in this recipe? expand_more

While you can reduce the sugar slightly, it's important to remember that sugar contributes to the cake's moisture and tenderness. Reducing it too much can result in a dry and less flavorful cake. I would recommend reducing the sugar by no more than 1/4 cup. You can also try using a natural sweetener, such as honey or maple syrup, in place of some of the granulated sugar, but keep in mind that this may affect the cake's texture and flavor.

Can I use a different type of flour? expand_more

Yes, you can experiment with different types of flour. Whole wheat flour will give the cake a slightly denser texture and a nuttier flavor. Cake flour will result in a more tender and delicate cake. If using whole wheat flour, I recommend using half whole wheat flour and half all-purpose flour to prevent the cake from being too dense. When substituting flours, be mindful of the moisture content and adjust the liquid ingredients accordingly.

Can I make this cake in a different size pan? expand_more

Yes, you can make this cake in a different size pan, but you will need to adjust the baking time accordingly. If using a smaller pan, the cake will take longer to bake. If using a larger pan, the cake will bake faster. Keep a close eye on the cake and check for doneness frequently. You can also make this cake in a bundt pan, but be sure to grease and flour the pan thoroughly to prevent sticking.

What can I use instead of buttermilk? expand_more

If you don't have buttermilk on hand, you can easily make a substitute by adding 1 tablespoon of white vinegar or lemon juice to 1/2 cup of whole milk. Let it sit for 5 minutes, and it will thicken and curdle slightly, mimicking the acidity and texture of buttermilk. You can also use plain yogurt or sour cream thinned with a little milk as a substitute. Buttermilk adds a subtle tang and tenderizes the cake, so try to use a substitute that provides similar qualities.

How do I prevent the cake from sticking to the pan? expand_more

To prevent the cake from sticking to the pan, it's essential to grease and flour the pan thoroughly. You can use butter, shortening, or baking spray with flour. Make sure to coat every nook and cranny of the pan. Alternatively, you can line the bottom of the pan with parchment paper. After baking, let the cake cool in the pan for 10 minutes before inverting it onto a wire rack. This allows the cake to firm up slightly, making it easier to release from the pan.

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