There is something mighty comforting about a simple cake that comes together from pantry staples and cooks without ever turning on the oven, especially in the dog days of late summer. This old-fashioned 7-Up cake takes a shortcut with just five ingredients, yet it still brings that tender, buttery crumb folks have loved for generations. Making it in the slow cooker gives it a homespun charm all its own, with a soft golden interior and a lightly caramelized edge that feels like a little bit of vintage potluck sweetness brought right into the present day.
This cake is lovely served slightly warm with a spoonful of whipped cream, a scoop of vanilla ice cream, or a handful of fresh berries on the side. If you want to dress it up for company, a simple dusting of powdered sugar or a drizzle of lemon glaze fits beautifully, and for coffee hour, there is hardly a better companion than a small slice alongside a hot cup of coffee or a glass of cold milk.
5-Ingredient Slow Cooker Vintage 7-Up Cake
Servings: 8
Ingredients
1 box yellow cake mix
1 box instant lemon pudding mix, 3.4 ounces
4 large eggs
3/4 cup vegetable oil
3/4 cup 7-Up or other lemon-lime soda
Directions
1. Lightly grease the inside of a 5- to 6-quart slow cooker or line it with a parchment sling for easier lifting later.
2. In a large mixing bowl, beat together the yellow cake mix, lemon pudding mix, eggs, vegetable oil, and 7-Up until the batter is smooth and well combined.
3. Pour the batter into the prepared slow cooker and smooth the top. Lay a clean kitchen towel under the lid to catch condensation, then cover.
4. Cook on high for 1 1/2 to 2 hours, or until the top is set and a toothpick inserted in the center comes out mostly clean. Avoid lifting the lid too often while it cooks.
5. Turn off the slow cooker and let the cake rest for 15 to 20 minutes before lifting it out or slicing directly from the insert. Serve warm or cooled to room temperature.
Variations & Tips
Lemon Glaze Finish: If you want a little extra brightness, stir together powdered sugar and a bit of lemon juice and drizzle it over the cooled cake. That sweet-tart topping plays especially well with the lemon-lime soda flavor.
Citrus Twist: A teaspoon of finely grated lemon zest or orange zest in the batter gives the cake a fresher, more old-fashioned citrus perfume without changing the easy nature of the recipe.
Doneness Tip: Slow cookers vary quite a bit, so begin checking at the 1 1/2-hour mark. The cake should look set on top and spring back lightly when touched in the center.
Easy Serving Tip: For neat slices, let the cake cool more fully before cutting. For a cozy dessert bowl sort of treat, spoon it out warm and serve it almost like a pudding cake.