Sunshine Lemon Gluten-Free Layer Cake

Ingredients You’ll Need

Crafting this incredible gluten-free lemon cake requires a thoughtful selection of high-quality ingredients. Each component plays a vital role in achieving that perfect texture and unforgettable flavor. Below, we’ll break down the specific dry and wet ingredients for the cake, as well as those needed for our signature lemon frosting.

Dry Ingredients for the Cake

The foundation of any great cake lies in its dry ingredients. Here’s what you’ll need to create the perfect gluten-free base:

• Gluten-Free 1:1 Baking Flour (300 grams / 2 cups): The choice of gluten-free flour is paramount. We strongly recommend a high-quality 1:1 gluten-free baking flour blend, as it significantly impacts the cake’s texture. This is our top recommended brand for consistent results. A crucial note: avoid using Cup4Cup gluten-free flour for this recipe, as it tends to yield an overly gummy cake.
• Cornstarch (60 grams / ½ cup): This is a key ingredient that, when combined with the 1:1 gluten-free flour, mimics the light consistency of traditional cake flour. Cornstarch is essential for achieving an airy, tender cake crumb.
• Baking Powder (1 tablespoon): As a primary leavening agent, baking powder is responsible for creating the rise and contributing to the light, fluffy structure of the cake. Ensure yours is fresh for optimal results.
• Salt (½ teaspoon): We prefer fine sea salt for all our baking. A small amount of salt enhances all the other flavors in the cake, balancing the sweetness and brightening the lemon notes.

Wet Ingredients for the Cake

These wet ingredients infuse the cake with moisture, richness, and that irresistible lemon flavor:

• Granulated Sugar (400 grams / 2 cups): Fine granulated sugar is ideal for achieving a smooth batter and a perfectly sweet cake. Domino granulated fine sugar is a personal favorite, but any good quality granulated sugar will work.
• Lemon Zest (2 tablespoons, from 2-3 lemons): The zest is where much of the lemon’s essential oils reside, providing a concentrated, bright flavor that lemon juice alone cannot replicate. It’s an absolute must for a truly aromatic lemon dessert.
• Butter (¾ cup, at room temperature): We opt for salted butter in our baking as it adds a deeper, more nuanced flavor. Ensure your butter is at room temperature for optimal creaming with the sugar, which is crucial for the cake’s texture.
• Oil (¼ cup vegetable or canola oil): A neutral-flavored oil like vegetable or canola oil contributes to the cake’s overall moisture and tenderness, ensuring it stays soft for longer.
• Buttermilk Powder (6 tablespoons): This is truly the “magic ingredient” for an incredibly light and tender crumb in gluten-free baking. We highly recommend using buttermilk powder (such as SACO brand) over liquid buttermilk for its superior effect on texture.
• Water (1 ½ cups, at room temperature): Combined with the buttermilk powder, this forms our liquid base. Room temperature water helps all ingredients emulsify smoothly, leading to a more consistent and tender cake batter.
• Egg Yolks (2 large, at room temperature): Separating eggs allows us to harness the richness of the yolks and the leavening power of whipped whites. Egg yolks add a beautiful depth of color and a luxurious richness to the cake.
• Lemon Extract (1 ½ teaspoons): For the ultimate lemon experience, lemon extract intensifies the citrus notes, adding an extra layer of bright, concentrated flavor that makes this cake truly stand out.
• Vanilla Extract (½ teaspoon): A touch of vanilla extract provides a subtle warmth and balances the tartness of the lemon, rounding out the flavor profile beautifully.
• Egg Whites (6 large, at room temperature): Whipped egg whites are folded into the batter to create an incredibly airy, fluffy texture. This step is critical for a light cake.
• Cream of Tartar (⅛ teaspoon): Added to the egg whites, cream of tartar helps stabilize them, ensuring they whip up to stiff peaks and hold their volume, preventing them from collapsing back into the batter.

Craving more lemon baked goods? You might also enjoy these fluffy lemon muffins!

Ingredients for Lemon Frosting

This unique frosting offers the best of both worlds – the richness of buttercream and the delightful tang of cream cheese. Here’s what you’ll need:

• Powdered Sugar (600g / 5 cups): Also known as confectioners’ sugar, this provides the smooth, fine texture essential for a silky frosting. Any brand will work perfectly.
• Butter (230g / 1 cup, softened to room temperature): Use salted butter for enhanced flavor. Ensuring it’s at room temperature is crucial for beating it into a creamy, lump-free base with the powdered sugar.
• Lemon Juice (2 tablespoons): Freshly squeezed lemon juice is paramount here. It delivers that bright, tangy counterpoint that cuts through the sweetness and truly defines the lemon flavor of the frosting.
• Pure Vanilla Extract (1 teaspoon): A good quality vanilla extract adds a lovely depth and warmth, perfectly complementing the vibrant lemon.
• Cream Cheese (224g / 8 ounces, full-fat brick style, softened to room temperature): Using full-fat, brick-style cream cheese softened to room temperature ensures a rich, stable, and wonderfully smooth frosting texture. Avoid low-fat or whipped varieties.

How to Make Gluten-Free Lemon Cake

Baking this glorious gluten-free lemon cake is a rewarding process. Follow these step-by-step instructions carefully to achieve a perfect, delectable result every time.

Make the Cake

1. Preheat your oven to 350°F (175°C). Prepare three 8-inch round cake pans by greasing them thoroughly. Cut circles of parchment paper to fit the bottom of each pan, lay them in, and then grease the parchment paper again. This ensures your cakes release cleanly.
2. In a medium-sized bowl, whisk together the gluten-free 1:1 baking flour, cornstarch, baking powder, and salt. Whisk until well combined to ensure even distribution of the leavening agents.
3. In a separate bowl, add the granulated sugar and lemon zest. Using your fingertips, rub the zest into the sugar. This simple technique helps release the essential oils from the lemon zest, intensifying its flavor and aroma in the final cake.
4. Transfer the lemon-infused sugar, softened butter, and vegetable or canola oil into the bowl of a stand mixer fitted with a paddle attachment. Whip on medium-high speed for about 3 minutes until the mixture is light, fluffy, and pale in color. This creaming process incorporates air, contributing to the cake’s tender texture.
5. Add the egg yolks one at a time, mixing thoroughly after each addition until just combined. Then, mix in the lemon and vanilla extracts. Scrape down the sides and bottom of the bowl with a rubber spatula to ensure all ingredients are well incorporated.
6. In a separate small bowl or, even better, a blender (for maximum smoothness), whisk together the buttermilk powder and room temperature water until completely combined and free of lumps. This creates our liquid buttermilk.
7. With the mixer on low speed, begin adding the dry and wet ingredients alternately to the batter. Start by adding one-third of the flour mixture, mixing just until it’s incorporated. Next, add half of the prepared buttermilk mixture and mix until just combined. Follow with another one-third of the flour mixture, then the remaining buttermilk. Finish by mixing in the last one-third of the flour mixture, being careful not to overmix at any stage. Overmixing can lead to a tougher cake.
8. In a clean, separate mixing bowl, using an electric hand mixer or the whisk attachment of your stand mixer, whip the 6 large egg whites with the cream of tartar on medium-high speed. Continue whipping until stiff, but not dry, peaks form. The egg whites should hold their shape when the whisk is lifted.
9. Gently fold the whipped egg whites into the cake batter in three additions using a rubber spatula. With each addition, carefully fold until just combined. Avoid over-mixing, as this will deflate the egg whites and reduce the cake’s airy texture.
10. Divide the batter evenly among your three prepared cake pans. Bake for 20-24 minutes, or until the cakes are golden brown and a toothpick inserted into the center of each cake comes out clean.
11. Allow the cakes to cool in their pans for precisely 5 minutes. Then, carefully invert them onto a wire rack to cool completely. Ensure the cake layers are entirely cool before you even think about frosting them, as warm cake will melt the frosting.

Make the Frosting

This creamy, tangy lemon frosting is the perfect crown for your gluten-free lemon cake.

1. In a large bowl, using either a hand-held mixer or a stand mixer fitted with a whisk or paddle attachment, beat the softened butter on medium speed until it’s wonderfully creamy, which typically takes about 2 minutes. Add the room-temperature cream cheese and continue beating until the mixture is completely smooth and thoroughly combined.
2. With the mixer running on low speed, gradually add the powdered sugar, fresh lemon juice, pure vanilla extract, and a pinch of salt. Once combined, increase the mixer speed to high and beat for 3 minutes until the frosting is light and fluffy. If you find the frosting too thin, add a little more powdered sugar; if it’s too thick, gradually add more lemon juice, a teaspoon at a time, until you reach your desired consistency.
3. To assemble your layer cake, place one cooled cake layer onto your chosen cake stand or serving plate. Spread an even layer of frosting generously over the top. Carefully place the second cake layer on top, then spread the remaining frosting evenly over the top and sides of the entire cake. Garnish with fresh lemon slices or zest if desired. Slice, serve, and savor every delicious moment!