Pour clear lemon-lime soda in the slow cooker and 3 other simple ingredients to get a dessert so delicious your family will be begging for more!

This 4-ingredient slow cooker vintage 7-Up pound cake leans into a charming mid-century shortcut: using clear lemon-lime soda to stand in for the traditional creaming of butter, sugar, and eggs. Instead of fussing with a mixer, you pour the soda straight into the bottom of the slow cooker, nestle in a simple prepared pound cake batter, and let gentle heat do the work. The result is a moist, tender, almost steamed-style pound cake with a bright citrus aroma and a buttery, nostalgic flavor that feels right at home on a Sunday table or after a weeknight dinner.

Serve warm slices straight from the slow cooker with a spoonful of the lemon-lime syrup from the bottom drizzled over the top. A dollop of lightly sweetened whipped cream or a scoop of vanilla ice cream plays beautifully with the buttery, citrus notes. For a brunch table, pair this cake with fresh berries and black coffee or hot tea. In the evening, it’s lovely alongside a glass of cold milk or a small pour of dessert wine like Moscato.

Servings: 8-10

1 1/2 cups clear lemon-lime soda (such as 7-Up, Sprite, or similar), divided

Grease the inside of a 5- to 6-quart slow cooker generously with butter to prevent sticking and help the cake release easily.

Pour 1 cup of the clear lemon-lime soda into the bottom of the greased slow cooker. The soda should form a shallow layer across the base; this is what creates the moist, almost steamed environment for the cake.

In a medium mixing bowl, whisk together the dry yellow cake mix and the instant vanilla pudding mix until evenly combined and no lumps of pudding powder remain.

Add the melted, slightly cooled butter and the remaining 1/2 cup lemon-lime soda to the dry mixture. Stir with a spatula or wooden spoon just until a thick, smooth batter forms. Do not overmix; stop when there are no visible dry streaks.

Carefully spoon the batter into the center of the slow cooker, directly over the layer of soda. Mound it so it sits like a domed island in the middle; do not stir it into the soda. The batter will spread slightly as it cooks.

Place a clean kitchen towel or a double layer of paper towels over the top of the slow cooker crock, then set the lid on top. This helps absorb excess moisture so the cake surface sets instead of becoming soggy.

Cook on HIGH for 2 to 2 1/2 hours, or until the top of the cake is set, the edges are lightly pulling away from the sides, and a toothpick inserted into the center of the cake portion comes out with just a few moist crumbs (no wet batter). Avoid lifting the lid in the first 90 minutes to maintain steady heat.

Once done, turn off the slow cooker and let the cake rest, covered, for 10 to 15 minutes. During this time, some of the lemon-lime syrup at the bottom will thicken slightly.

Using a wide spatula, gently loosen the edges of the cake from the sides of the slow cooker. You can either lift out large pieces or scoop directly from the crock. Spoon some of the warm lemon-lime syrup from the bottom over each serving for extra moisture and flavor.

Serve warm. If you have leftovers, cool completely, then transfer slices to an airtight container and refrigerate for up to 3 days. Rewarm gently in the microwave before serving for the best texture.

For a stronger citrus profile, add 1 to 2 teaspoons of finely grated lemon or lime zest to the batter along with a teaspoon of vanilla extract. You can also swap the yellow cake mix for a white or lemon cake mix to play up the soda’s flavor. If you prefer a slightly richer texture, stir in 1/4 cup sour cream to the batter; if you do this, add an extra tablespoon or two of soda to maintain a pourable consistency. For a glazed finish, whisk 1 cup powdered sugar with 2 to 3 tablespoons of cooled lemon-lime soda and drizzle over the warm cake once removed from the slow cooker. To reduce sweetness, choose a less-sweet lemon-lime soda or use a mix of soda and plain sparkling water, keeping the total liquid the same. Food safety tips: Always use instant pudding, not cook-and-serve, to ensure proper thickening without additional stovetop cooking. Make sure the cake reaches a safe internal temperature of at least 190–200°F in the center for a fully set crumb. Do not leave the slow cooker on the “Warm” setting for more than 2 hours after cooking to avoid quality and safety issues; cool leftovers promptly and refrigerate. If using a smaller or larger slow cooker, adjust cooking time slightly and check early to prevent overcooking.