1kg Butter Cake Recipe: Ultra-Moist Vanilla Height Without Collapse

This 1kg butter cake recipe delivers the perfect balance of ultra-moist crumb and towering height without that dreaded collapse. The secret lies in precise ingredient ratios and gentle folding techniques that create air pockets while maintaining structure. After years of perfecting this classic, I’ve developed a method that ensures every slice stays tender for days—no dry crumbs in sight.

The foundation of a great butter cake begins with creaming 1kg of butter with sugar until light and fluffy, a step that builds the cake’s signature airiness. Whole eggs and yolks add richness, while vanilla extract enhances the flavor depth. The key to avoiding a dense cake? Folding in the dry ingredients just until combined, preserving those delicate air bubbles that create the perfect texture.

What you’ll achieve is a cake with a golden, crackly top and a moist, velvety interior that melts in your mouth. The layers hold their shape beautifully, making it ideal for stacking or serving as a single showstopper. This recipe is designed for reliability—whether you’re baking for a celebration or simply craving a classic dessert.

For those who love customization, the batter can be adapted with add-ins like citrus zest or chocolate chips, though the vanilla version remains the gold standard. The baking time is carefully calibrated to ensure even doneness without overbrowning. Let’s get started on creating your perfect slice.

Ingredients for 1kg butter cake

The secret to this legendary 1kg butter cake lies in precise ratios and expert techniques.

The butter is non-negotiable—European-style unsalted like Plugrá or Land O'Lakes works best, but anything with high fat content (82%+) will do. Cold cubes are essential for proper creaming. If your butter is too soft, chill it for 30 minutes before starting. The sugar? Superfine dissolves faster, but if you only have granulated, pulse it in a food processor for 30 seconds. Eggs should be room temperature—cold yolks can break the emulsion. For the flour, King Arthur or Bob's Red Mill are reliable choices, but any all-purpose will work if sifted properly.

No vanilla extract? Vanilla bean paste works in a pinch, but the flavor won't be as pure. Short on cake flour? Replace with 4 oz all-purpose plus 4 oz cornstarch for the same tenderizing effect. The milk can be swapped for half-and-half or heavy cream for extra richness. For a nutty depth, add 1 tsp almond extract—but don't overdo it. If you're baking at high altitude, reduce baking powder by 1/4 tsp. The cornstarch is crucial for that signature moist crumb; don't skip it unless you're using cake flour.

This batter is delicate—use it within 2 hours of mixing for best results. Store any leftovers in the fridge for up to 2 days, covered tightly. The cake itself keeps beautifully for 5 days at room temperature wrapped in plastic, or 2 weeks in the fridge. For freezer storage, wrap tightly in plastic and foil, then freeze for up to 3 months. Always bring it to room temperature before serving—cold cake is tough. Slice with a serrated knife dipped in hot water for clean cuts every time.

Step-by-step instructions for ultra-moist vanilla butter cake

Here's the method that guarantees a towering, moist crumb without that dreaded collapse.

In a stand mixer fitted with the paddle attachment, beat the 43.36 oz unsalted butter (cold, cubed) and 36 oz granulated white sugar on medium speed for 5-7 minutes. You're aiming for a light, fluffy texture that nearly doubles in volume and becomes pale in color. This thorough creaming incorporates air that will create that signature tender crumb.

I press down on the butter mixture with a spatula every minute or so—this ensures even emulsification and prevents the sugar from settling at the bottom. The mixture should look like thick, pale ribbon when you lift the paddle. If it feels too warm after mixing, chill it for 10 minutes before proceeding. Cold butter creates better structure in the final cake.

Add the 8 whole large eggs one at a time, mixing on low speed for 30 seconds after each addition until fully incorporated. This slow incorporation prevents the eggs from scrambling in the hot butter mixture. After all eggs are added, mix in the 2 tbsp pure vanilla extract and 0.5 tsp almond extract for that signature depth of flavor.

Here's the thing—don't rush this step. The eggs should blend completely before adding the next one. I like to scrape down the sides of the bowl with a silicone spatula to ensure everything gets fully incorporated. The batter should be thick, smooth, and ribbon-like at this stage. If it looks curdled, don't worry—it will come together when we add the dry ingredients.

In a separate bowl, whisk together the 56 oz all-purpose flour, 8 oz cake flour, 1.5 tsp baking powder, 0.5 tsp salt, and 2 tbsp cornstarch. Sift the dry ingredients directly into the wet mixture while mixing on low speed. This prevents gluten development that would make the cake dense. Mix just until combined—you should still see small flour streaks.

With the mixer running on low, gradually add the 1.5 cups whole milk until the batter is smooth and homogeneous. The batter should be thick and glossy, like freshly painted walls. If it looks too stiff, add 1-2 tablespoons more milk. The reason we use milk here is that it adds moisture without making the cake too dense. This is where the cake gets its signature moistness that lasts for days.

Preheat your oven to 350°F and grease two 9-inch round cake pans with butter or line with parchment paper. Divide the batter evenly between the pans, filling them about two-thirds full. This prevents overflow during baking. Tap each pan firmly on the counter 3-4 times to remove any air bubbles that could cause sinking.

Bake for 25-30 minutes until a toothpick inserted in the center comes out clean. The edges should be golden brown, but the top should still look slightly domed. Don't overbake—this is the #1 reason butter cakes collapse. The internal temperature should reach 205-210°F when done. I like to tent the pans with foil after 20 minutes to prevent over-browning while still allowing steam to escape.

Remove the cakes from the oven and let them cool in the pans for 10 minutes. Then transfer them to a wire rack to cool completely. Here's where patience pays off—cooling the cakes completely before layering prevents that dreaded collapse. I like to level the tops with a serrated knife if they've domed too much during baking.

For the final touch, spread a thin layer of buttercream between layers and on the outside. This not only adds flavor but also helps stabilize the cake structure. Let the cake sit at room temperature for at least 2 hours before slicing—this allows the flavors to meld and the crumb to set properly. The result should be a towering, moist cake that holds its shape perfectly.

Dietary considerations for this dish

Gluten-Free Adaptations

To make this butter cake gluten-free, replace the all-purpose flour and cake flour with a 1:1 gluten-free baking flour blend like King Arthur Measure for Measure or Bob's Red Mill 1-to-1. Add 1 tsp xanthan gum to the dry ingredients to mimic gluten's structure. The cornstarch can stay as-is, but reduce it to 1 tbsp since gluten-free flours absorb moisture differently. For best results, chill the batter for 30 minutes before baking to prevent excessive spreading. 🌾

Dairy-Free Options

For a dairy-free version, swap the butter for Earth Balance vegan butter or Miyoko's creamery cultured cashew butter—both work well in creaming. Use unsweetened almond milk or oat milk instead of whole milk, but add 1 tbsp cornstarch to compensate for the lack of fat. The cake will be slightly less rich, but still moist. For extra richness, add 2 tbsp melted coconut oil to the butter substitute. 🥛

Lower-Sugar Versions

Reduce the sugar to 24 oz and replace the remaining 12 oz with erythritol or monk fruit sweetener (like Lakanto) for a lower-glycemic option. The texture will be slightly denser, so add 1 extra egg white for structure. For a more natural sweetener, use mashed banana or applesauce (up to ½ cup) to replace sugar, but reduce other liquids by 2 tbsp to balance moisture. 🍎

Nut-Free Considerations

If avoiding nuts, skip the almond extract and replace it with 1 extra tsp vanilla extract or ½ tsp coconut extract for depth. For the cornstarch, use arrowroot powder instead if you're also avoiding corn allergens. Always check your gluten-free flour blend for nut cross-contamination warnings. The cake will still be delicious—just slightly less complex in flavor. 🌿

Egg-Free Substitutions

Replace the 8 eggs with a flax egg mix: combine 8 tbsp ground flaxseed with 16 tbsp warm water, let sit for 5 minutes until gelled. For extra moisture, add ¼ cup unsweetened applesauce to the batter. The cake may be slightly denser but will still hold its shape. Chill the batter for 20 minutes before baking to improve texture. 🥚

Frequently asked questions