All-In-One Cake Recipe: Mix, Bake, Serve—No Frosting Needed

This all-in-one cake recipe eliminates the stress of layering, frosting, and decorating—just mix, bake, and serve. 💛 The secret lies in a moist, self-filling batter that transforms into a rich, tender cake with a velvety center, all without needing extra frosting or assembly.

I perfected this after years of baking, ensuring every bite delivers that perfect balance of texture and flavor. What sets this recipe apart is its simplicity: one bowl, no frosting, no fuss.

The cake bakes up with a golden crust and a soft, cakey interior, while the filling—made from the same batter—creates a luscious center that melts in your mouth. No special tools or techniques are required, just a standard cake pan and a few pantry staples.

The result is a foolproof dessert that’s ready in under an hour, including baking time. It’s ideal for birthdays, potlucks, or even a spontaneous treat—because who has time for complicated desserts? The cake stays moist for days, making it perfect for meal prep or last-minute celebrations.

Serve it warm with a scoop of ice cream or enjoy it at room temperature. Here’s how to make it effortlessly perfect.

Ingredients for all in one cake

Twelve simple ingredients transform into a velvety, self-filling dream cake—no frosting, no fuss, just pure indulgence.

The butter and sugar are the heart of this cake—room temperature is non-negotiable (trust me, cold butter makes for a dense mess). I always grab Land O’Lakes unsalted from the store’s dairy case—it’s reliable and affordable. For the flour, King Arthur all-purpose is my go-to (the sifting step is worth it). The blueberries? Trader Joe’s frozen work perfectly—they stay bright and don’t bleed as much as fresh. Fresh lemon zest is a game-changer here—zest more than juice for that bright, tangy kick that keeps the cake from tasting flat.

No powdered sugar? Granulated sugar plus a pinch of cornstarch does the trick (mix 1 tbsp cornstarch with 1 cup granulated sugar). Short on butter? Vegetable oil works 1:1, though the texture will be slightly denser. The baking powder is critical—double-check the expiration date (old baking powder = flat cake). No fresh blueberries? Raspberries or blackberries add a different but equally lovely pop. And if you’re avoiding dairy, coconut milk replaces the regular milk (though the texture will be slightly lighter).

This cake stays moist for 4-5 days when wrapped tightly in plastic—double-wrap for extra insurance. For the best texture, bake it in a 9x13-inch pan (or two 8-inch rounds) and let it cool completely before slicing. Room temperature is key—if it’s chilled, the filling won’t set properly. Store leftovers in the fridge for up to 5 days, but honestly? It’s gone in hours. Freeze slices for 3 months if you’re planning ahead—just thaw at room temperature.

Step-by-step instructions for all-in-one cake: mix, bake, serve—no frosting needed

This cake comes together in one bowl with no fuss—just mix, bake, and enjoy!

If using the fresh blueberries, toss them in a small bowl with the 1 tbsp lemon zest and 1 tbsp lemon juice. Let this sit for 5 minutes while you prep the batter—this brightens their flavor and prevents them from turning mushy. I like to leave them whole for pockets of juicy surprise, but you could also mash a few for extra depth if you prefer.

Here's the thing—this step is entirely optional, but it transforms your cake from basic to showstopper. The lemon zest adds a subtle citrus zing that pairs perfectly with the blueberries. If you skip it, your cake will still be delicious, but this is where the magic happens for that extra layer of flavor.

In a large mixing bowl, combine the 1.5 cups unsalted butter (cubed and at room temperature), 2 cups granulated sugar, 4 whole large eggs, 1 cup milk, 0.5 cup vegetable oil, 2 tsp vanilla extract, and 0.5 tsp salt. Using an electric mixer on medium speed, beat everything together for 3-4 minutes until the mixture is light, fluffy, and nearly doubles in volume.

This is where the cake's texture foundation gets built. You're incorporating air into the batter, which creates that signature tender crumb. I press down on the mixture with my finger at the end of mixing—if it springs back slowly, you're good to go. If it's still dense, mix another 30 seconds. Don't rush this step; under-mixing leads to dense cake.

With the mixer running on low speed, gradually add the 2.5 cups all-purpose flour and 2 tsp baking powder in two additions. Mix just until combined—you should still see some flour streaks. Overmixing develops gluten, which makes cake tough. Stop mixing as soon as the dry ingredients disappear into the wet mixture.

Here's a pro tip: I like to use a spatula to gently fold in the last bit of flour from the edges of the bowl. This ensures even distribution without overworking the batter. The mixture should be thick but pourable. If it looks too stiff, add 1-2 tablespoons of milk to loosen it. The batter should coat the back of a spoon smoothly.

Gently fold the blueberry-lemon mixture into the batter using a silicone spatula. Work quickly but carefully to avoid crushing the berries—you want them to stay intact for those juicy bursts in every bite. If you're feeling fancy, you could also create a marble effect by reserving a small amount of batter and swirling it in after pouring, but that's completely optional.

Don't skip this gentle folding technique. Dumping the blueberries in all at once can cause them to sink to the bottom, creating a berry-heavy layer. By folding, you distribute them evenly throughout the batter for consistent flavor and texture in every slice.

Preheat your oven to 350°F and grease a 9-inch round cake pan or line it with parchment paper. Pour the batter into the prepared pan and smooth the top with a spatula. Bake for 35-40 minutes until the top is golden brown and a toothpick inserted in the center comes out clean (or with a few moist crumbs—this is perfect for one-bowl cakes).

The cake is done when the edges pull away slightly from the pan and the top springs back when pressed gently. I always check for doneness at the 30-minute mark because ovens vary. If the top browns too quickly, tent the cake with foil to prevent over-browning while it continues to bake through.

Let the cake cool in the pan for 10 minutes, then transfer it to a wire rack to cool completely. While it cools, dust the top with 1 cup powdered sugar for that classic all-in-one cake finish. The powdered sugar adds a delicate sweetness that complements the cake's natural flavors without needing frosting.

This cake tastes best at room temperature, so if you're in a hurry, you can serve it after 30 minutes of cooling, but it's worth the wait for that perfect texture. The powdered sugar dusting should be light—just enough to catch the light and add a touch of elegance. Serve with a cup of tea or coffee for the ultimate comforting treat!

Pro cooking tips for great all in one cake

Mixing Like a Pro

Use a stand mixer with a paddle attachment for the wet ingredients—it incorporates air more efficiently than hand mixing. I beat the butter and sugar for 3-4 minutes until the mixture is pale and fluffy, then gradually add the eggs one at a time to avoid curdling.

A hand mixer works too, but you’ll need to mix for 5-6 minutes to achieve the same lightness. 💛

Batter Consistency Check

Your batter should be thick but pourable, like heavy pudding. If it’s too stiff, add 1 tablespoon of milk at a time until it reaches the right consistency. I test by scooping up a spoonful—it should hold its shape but still slide off smoothly.

Overmixing after adding flour will make the cake tough, so stop as soon as the dry ingredients disappear.

Pan Prep Matters

Grease your 9-inch round pan with butter or baking spray, then line the bottom with parchment paper for easy removal. I also dust the bottom lightly with flour to prevent sticking.

For a 9x13-inch pan, reduce baking time by 5-7 minutes—these pans bake faster due to their larger surface area. Always use an oven thermometer to confirm your oven’s accuracy (most run hot!).

Baking Time Secrets

Start checking for doneness at 30 minutes—every oven behaves differently. The cake is done when a toothpick comes out with a few moist crumbs (not wet batter). If the edges brown too quickly, tent with aluminum foil to prevent over-browning while the center finishes baking.

For a perfectly even rise, place the pan on the middle rack of your oven.

Cooling for Texture

Let the cake cool in the pan for 10 minutes before transferring to a wire rack—this prevents cracking. The powdered sugar dusting should be applied when the cake is completely cool to avoid melting.

If you’re in a hurry, serve it at room temperature (after 30 minutes), but the texture will be even better after 1-2 hours. 💡

Flavor Boosters

For extra depth, add ½ teaspoon of cinnamon or ¼ teaspoon of nutmeg to the dry ingredients. A splash of almond extract (¼ teaspoon) pairs beautifully with the vanilla. If you love citrus, swap the lemon zest for orange zest—it adds a bright, floral note.

The key is to taste as you go and adjust to your preference!

Frequently asked questions