Vegan Lemon Cake

This vegan lemon cake is bright, soft, and layered with a smooth lemon frosting that tastes like pure citrus. Fresh lemon juice and plenty of zest do all the flavor work, while oil and oat milk keep the crumb tender for days.

If you already love our classic lemon drizzle cake, this is the layered celebration version to bake next. The batter comes together in about 20 minutes, and no eggs or dairy show up anywhere in it.

Quick Recipe Overview

Prep Time: 20 minutes
Bake Time: 28 to 32 minutes
Cooling Time: 45 minutes
Total Time: About 1 hour 15 minutes, plus cooling
Servings: 12 slices
Oven Temperature: 350°F (175°C)
Pans: Two 8 inch round cake pans

Quick Ingredients: all purpose flour, granulated sugar, baking powder, baking soda, salt, lemon zest, oat milk, neutral oil, fresh lemon juice, vanilla extract, vegan butter, powdered sugar.

Quick Steps: Rub the zest into the sugar. Whisk the dry ingredients, whisk the wet ingredients, then combine into a smooth batter. Divide between two pans and bake until golden. Cool fully, beat the frosting, and layer the cakes.

Why This Vegan Lemon Cake Works

Three things carry this recipe. The lemon juice reacts with the baking soda and baking powder to give the layers their lift without eggs. Oil keeps the crumb moist for days, longer than butter ever manages in a citrus cake. And rubbing the zest into the sugar before any liquid goes in pulls the lemon oils out of the peel, so the flavor runs through every bite instead of sitting on top.

Oat milk stays neutral, so nothing competes with the lemon. The result is a vegan lemon cake with a fine, even crumb and a clean citrus finish that never tastes bitter or dull.

Ingredients for Vegan Lemon Cake

For the Cake

• 2 3/4 cups all purpose flour
• 1 1/2 cups granulated sugar
• 2 teaspoons baking powder
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• Zest of 3 lemons, about 2 tablespoons
• 1 1/2 cups oat milk, at room temperature
• 1/2 cup neutral oil, such as sunflower or grapeseed
• 1/3 cup fresh lemon juice
• 2 teaspoons vanilla extract

For the Lemon Frosting

• 1/2 cup vegan butter, softened
• 3 cups powdered sugar, sifted
• 2 to 3 tablespoons fresh lemon juice
• 1 teaspoon lemon zest
• Pinch of salt

Lemons. Use fresh lemons for both the zest and the juice. Bottled juice tastes flat in a cake where lemon carries the whole flavor. Roll each lemon firmly on the counter before juicing it, and you will get noticeably more juice out.

Oat milk. Oat milk blends smoothly into the batter and stays neutral in flavor. Soy milk works just as well. Shake the carton well before measuring so the milk pours evenly.

Flour. Spoon the flour into the measuring cup and level it off with a knife. Flour scooped straight from the bag packs down, and packed flour is the fastest route to a heavy crumb.

Vegan butter. Use a firm block style vegan butter for the frosting. Soft spreads from a tub whip up loose and can make the finished frosting slide off the layers.

How to Make Vegan Lemon Cake

Step 1: Prepare the Pans and Oven

Heat the oven to 350°F (175°C). Grease two 8 inch round cake pans and line the bottoms with parchment paper. Citrus cakes like to stick, so the parchment earns its place here.

Step 2: Rub the Zest into the Sugar

Put the sugar in a large bowl and add the lemon zest. Rub the zest into the sugar with your fingertips until the sugar looks pale yellow and smells strongly of lemon. Whisk in the flour, baking powder, baking soda, and salt.

Step 3: Whisk the Wet Ingredients

In a second bowl, whisk the oat milk, oil, lemon juice, and vanilla until combined. The mixture may look slightly split from the acid in the juice. That is fine, and it smooths out once it meets the flour.

Step 4: Combine the Batter

Pour the wet mixture into the dry mixture and stir until just combined. A few tiny lumps are fine. Stop as soon as no dry flour shows, because extra stirring builds gluten and turns a tender crumb tough.

Step 5: Bake

Divide the batter evenly between the pans and smooth the tops. Bake for 28 to 32 minutes, until the layers are golden, the tops spring back when pressed lightly, and a toothpick inserted in the center comes out clean.

Step 6: Cool Completely

Cool the cakes in the pans for 10 minutes, then turn them out onto a rack. Let them cool fully, about 45 minutes, before frosting. Warm layers melt the frosting on contact and slide against each other.

The Lemon Frosting

Beat the softened vegan butter until smooth and pale. Add the powdered sugar one cup at a time, beating on low speed so the sugar stays in the bowl. Add 2 tablespoons of lemon juice, the zest, and the salt, then beat until the frosting turns light and fluffy.

Add the third tablespoon of juice only if the frosting feels stiff. It should hold soft peaks and spread across the crumb without tearing it. If it ever feels loose, chill it for 15 minutes and beat it once more.

To assemble, spread half the frosting over the first layer and set the second layer on top. Finish with the rest of the frosting, then scatter a little extra zest over the top. Thin lemon slices pressed around the edge look sharp and take seconds.

Tips for a Moist Vegan Lemon Cake

• Zest the lemons before you juice them. Zesting a cut, juiced lemon is a fight you will lose.
• Measure the juice after zesting, and reach for a fourth lemon if you fall short of 1/3 cup.
• Bring the oat milk to room temperature so the batter mixes evenly and rises well.
• Check the layers at 28 minutes. Citrus cakes move from moist to dry quickly at the end of baking.
• Chill the frosted cake for 30 minutes before slicing, and every cut comes out clean.

Serving a table with mixed diets? Set this cake next to our vegan strawberry cheesecake and the whole dessert spread stays open to everyone.

Storage and Freezing

Store the frosted cake covered in the refrigerator for up to 4 days. The crumb stays moist, and the lemon flavor deepens by day two. Bring slices to room temperature for 20 minutes before serving so the frosting softens and the citrus opens up.

Unfrosted layers freeze well for up to 3 months. Wrap each layer tightly, thaw overnight in the refrigerator, then frost as usual. For safe storage times on all leftovers, follow the USDA leftovers and food safety guidelines.

Frequently Asked Questions

Can I bake vegan lemon cake in a loaf pan?

Yes. Pour all the batter into a greased 9 x 5 inch loaf pan and bake for 45 to 50 minutes. Frost the top only, and cut the loaf into thick slices.

Why did my vegan lemon cake turn out dense?

The usual causes are overmixing the batter, baking powder that has lost its strength, or an oven that runs cool. Stir only until the flour disappears, replace leaveners that have sat open for months, and check the oven with a thermometer.

Can I use bottled lemon juice instead of fresh?

Fresh juice is strongly recommended here. Bottled juice tastes dull and slightly bitter once baked, and lemon carries this entire cake. You need fresh lemons for the zest anyway, so juice those.

Can I turn this recipe into cupcakes?

Yes. Fill lined muffin cups two thirds full and bake for 18 to 22 minutes. The recipe makes about 24 cupcakes. Frost them once they are fully cool.