Description

This delightful Lemon Cake features a tender, moist crumb infused with fresh lemon zest and juice, paired perfectly with a secret fluffy lemon frosting that is less sweet yet rich and creamy. The cake layers are light and airy, made with a delicate balance of butter, milk, and citrus, then finished with a smooth, luscious lemon frosting that includes a unique thickened roux base for extra fluffiness and a subtle tang. Perfect for spring and summer gatherings or any celebration where a bright, flavorful dessert is desired.

Ingredients

Scale

Cake Ingredients

2 cups plain / all purpose flour (cake flour also OK)
2 1/2 teaspoons baking powder
1/4 teaspoon salt
4 large eggs (50 – 55g / 2 oz each), at room temperature
1 1/2 cups caster / superfine sugar (granulated/regular ok too)
115g / 1/2 cup unsalted butter, cut into 1.5cm / 1/2” cubes
1 cup full-fat milk
3 teaspoons vanilla extract (highest quality you can afford)
3 teaspoons vegetable or canola oil
3 tablespoons lemon zest (from 2 lemons)
1/3 cup lemon juice
1/4 teaspoon natural lemon extract (lemon oil), optional but recommended

Frosting Ingredients

6 1/2 tablespoons plain/all purpose flour
1 1/3 cups full-fat milk
1 1/3 cups caster / superfine white sugar (or granulated/ordinary)
300g / 1 1/3 cups unsalted butter, softened
3 teaspoons lemon zest (from 1 lemon)
4 tablespoons fresh lemon juice

Instructions

Preparation: Preheat your oven to 180°C/350°F (160°C fan) about 20 minutes before starting the batter, and place the rack in the middle of the oven for even baking.
Prepare Cake Pans: Grease three 20cm (8-inch) cake pans with butter and line them with parchment paper for easy removal. Use pans without loose bases if possible for stability.
Combine Dry Ingredients: In a large bowl, whisk together the flour, baking powder, and salt. Set aside for later.
Beat Eggs: Using a stand mixer fitted with a whisk attachment or a hand mixer, beat the eggs on speed 6 for 30 seconds. Gradually add the sugar over about 45 seconds and then increase the speed to 8, beating for 7 minutes until the mixture triples in volume and turns a pale white.
Melt Butter and Heat Milk: While the eggs are beating, melt the butter in the milk either by microwaving for 2 minutes on high or warming gently on the stove. Avoid boiling; foam is fine. Keep warm if done early.
Incorporate Flour Into Egg Batter: Lightly sprinkle one-third of the flour mixture over the egg mixture and mix on low speed for 5 seconds. Add half of the remaining flour, mix again for 5 seconds, then add the rest of the flour and mix just until combined. Avoid overmixing to keep the batter airy.
Mix Milk Mixture with Egg Batter: In the empty flour bowl, combine warm milk-butter, vanilla extract, lemon juice, lemon zest, and oil. Add about 1 1/2 cups of the egg batter to this mixture and whisk vigorously until smooth and foamy.
Combine Batter Components: With the mixer on low speed, slowly pour the milk mixture into the egg batter over 15 seconds. Scrape the bowl to ensure all ingredients are incorporated and beat for an additional 10 seconds until the batter is smooth and pourable.
Bake the Cake: Divide the batter evenly into the prepared pans. Tap each pan firmly three times on the countertop to remove large air bubbles. Bake for approximately 23 minutes or until the tops are golden and a toothpick inserted in the center comes out clean.
Cool the Cake: Let the cakes cool in their pans for 15 minutes, then carefully turn them out onto cooling racks. For layered cakes, cool upside down so the domed top flattens nicely. Level the cakes if needed for stacking.
Make the Secret Fluffy Lemon Frosting – Roux: In a saucepan over medium heat, combine the flour and sugar and cook, stirring constantly, for 30 seconds. Slowly whisk in the milk to avoid lumps. Continue stirring until the mixture thickens to a thick, dolloping custard consistency.
Cool Roux: Transfer the roux to a bowl and cover with cling wrap pressed onto the surface to prevent a skin. Let cool for 20 minutes at room temperature, then chill in the fridge for 30 minutes, ensuring it does not become fridge-cold; it should thicken to a paste.
Prepare Frosting Butter Base: Beat the softened butter in a stand mixer or with hand beaters on medium-high speed for 3 minutes until pale, smooth, and fluffy.
Incorporate Roux into Butter: While beating on speed 5, add the cooled roux one tablespoon at a time over about 1 minute. Once fully incorporated, add lemon zest and fresh lemon juice. Whip for 2 minutes until frosting holds stiff peaks like whipped cream. Do not overbeat to avoid stickiness.
Frost the Cake: Place one cake layer upside down for a flat surface. Spread 3-4mm (0.12-0.16 inch) of frosting evenly over the layer. Stack the next upside-down cake layer and repeat. Top with the final cake layer right side up, then cover the entire cake with remaining frosting, smoothing the top and sides for a beautiful finish.

Notes

Note 1: Cake flour can be used for a lighter texture but all-purpose flour works well.
Note 2: Superfine sugar dissolves more quickly, but regular granulated sugar is acceptable.
Note 3: Room temperature eggs whip better and create more volume.
Note 5: Full-fat milk gives better texture; low-fat can be used but 0% fat is not recommended.
Note 6: Use the best vanilla extract you can afford for richer flavor.
Note 7: Vegetable or canola oil help keep the cake moist without interfering with flavor.
Note 8: Natural lemon extract (lemon oil) is optional but enhances lemon aroma and flavor.
Note 9: Preheating the oven ensures even baking and correct rising.
Note 10: Tapping the pans removes large air bubbles that could cause holes or uneven baking.
Note 13: Watch the thickening roux carefully; it should be thick enough to hold shape but not lumpy.
Note 14: Cooling the roux before adding it to butter prevents texture issues and keeps frosting fluffy.

Prep Time: 25 minutes
Cook Time: 23 minutes
Category: Dessert
Method: Baking
Cuisine: American

Keywords: Lemon cake, lemon frosting, fluffy frosting, citrus dessert, layered cake, homemade cake, lemon zest cake