This simple yogurt cake has a special place in my weeknight baking rotation. One evening YouTube recommended a flourless, sugar-forward sponge in Spanish and I watched it all the way through — not because I understood every word, but because the texture on screen looked impossibly tender and airy. I set out to recreate it with a few changes: no flour and no refined sugar. The result is a small, lemony cake with a creamy crumb, a delicate lift from whipped whites, and a pleasant tang from full-fat Greek yogurt. It feels indulgent without being heavy; every slice disappears faster than I expect.

I first made this when I wanted something simple to bring to a neighbor’s tea. I used a small 8-inch (20–22 cm) springform pan and kept the technique forgiving: separate the eggs, whip the whites to soft stiff peaks, fold carefully. The cake bakes quickly and finishes gently in the cooling oven so the center settles to a silky consistency instead of deflating. It’s an ideal dessert when you want something light, citrus-scented, and not overloaded with sweetness. Family members who usually reach for richer desserts were pleasantly surprised — one cousin declared it perfect with a dollop of fresh berries.

Ingredients

• Large eggs (4): Use fresh, large eggs at room temperature. Room-temperature whites whip to greater volume and yolks emulsify more smoothly; if you forget to let them sit, place eggs in warm water for 5–10 minutes.
• Xylitol (70 g / about 1/3 cup): A sugar alternative that behaves much like sugar in batters. If you prefer traditional sweetener, substitute granulated sugar 1:1. Measure precisely by spooning into the cup rather than packing for consistent sweetness.
• Greek yogurt, full fat (350 g / about 1 1/2 cups): I recommend a 3.5% fat plain Greek yogurt for creaminess and structure; brands like Fage or Chobani give stable results. Nonfat yogurts make the cake drier; whole-milk Greek yogurt is best for moistness.
• Vanilla pudding powder or vanilla protein powder (40 g / about 1/3 cup): Pudding powder works as a light binder and adds vanilla flavor; protein powder can be used for a lower-sugar option, though texture will be slightly firmer. Use a quality vanilla instant pudding mix for a tender crumb.
• Lemon zest (zest of 1 large organic lemon): Fresh zest is essential for bright citrus aroma. Avoid the white pith when zesting to prevent bitterness.
• Vanilla extract (1 teaspoon): Pure vanilla extract complements the lemon and rounds the flavor. I keep Nielsen-Massey on hand for dependable results.
• Cream of tartar or baking powder (1 teaspoon): The recipe benefits from a stabilizer for the whites; use 1 teaspoon cream of tartar to stabilize egg whites or 1 teaspoon baking powder to add gentle lift. If you have both, use 1/4 teaspoon cream of tartar and 1/2 teaspoon baking powder for balance.

Instructions

Preheat and prepare the pan: Preheat oven to 340°F (170°C) on conventional/top-and-bottom heat. Grease and line a small springform pan 8–9 inches (20–22 cm) with parchment, or lightly butter and flour (use a gluten-free dusting if desired). Position an oven rack in the center for even baking. Separate the eggs: Separate cold eggs into whites and yolks into clean, dry bowls. Any trace of yolk in the whites inhibits whipping, so separate carefully. Let the yolks come closer to room temperature while you work on the whites for better incorporation later. Whip the whites: Beat the egg whites with a stand mixer or handheld whisk. Add cream of tartar when the whites become foamy. Whip to stiff peaks — peaks that hold shape and don’t fold back on themselves — but avoid overbeating which makes them grainy and prone to weeping. Make the yolk base: In a separate bowl, beat the egg yolks with the xylitol until pale and slightly thickened. Add the Greek yogurt, lemon zest, and vanilla extract and whisk until smooth. The xylitol will integrate similarly to sugar, giving body without excess sweetness. Combine dry binder: Sift or whisk the vanilla pudding powder together with baking powder if using. Fold this dry mix into the yogurt-yolk mixture until uniformly combined; avoid overworking to keep the batter tender. Fold in the whites: Gently fold one-third of the whipped whites into the yolk mixture to lighten it, then carefully fold in the remaining whites in two additions. Use a large spatula and cut through the center, turning the bowl while folding — keep as much air as possible to maintain a fluffy texture. Bake and rest in oven: Pour batter into prepared pan and smooth the top. Bake about 30 minutes in the center of the oven; cake should be set at the edges and slightly jiggly in the center. Turn off the oven, crack the door open slightly, and let the cake rest inside for 30 minutes to cool and set gradually to prevent sudden collapse. Cool and unmold: After the oven rest, remove cake to a wire rack and let cool completely before releasing the springform. Chill for an hour if you prefer firmer texture. Slice with a serrated knife dipped in hot water then wiped clean for neat slices.

Storage Tips

Store the cake covered in the refrigerator for best texture; an airtight container or tightly wrapped cake will keep it moist and stop it from absorbing other fridge aromas. Refrigerated, slices stay fresh for 3–4 days. For longer storage, wrap individual slices in plastic wrap and place them in a freezer-safe bag for up to 2 months; thaw overnight in the fridge before serving. Reheat gently at low temperature (about 250°F / 120°C for 8–10 minutes) if you prefer a slightly warmed slice. Avoid leaving the cake at room temperature more than two hours because of the dairy content.

Ingredient Substitutions

Want to adapt ingredients? Swap xylitol for an equal measure of granulated sugar, maple syrup, or honey — reduce liquid elsewhere by a tablespoon if using liquid sweeteners. If you do not have vanilla pudding powder, use 1/3 cup all-purpose flour for a slightly denser but still tender cake, or 1/3 cup almond flour for a low-gluten option (note almond flour will brown more quickly). For a dairy-free version use a thick non-dairy yogurt like coconut-based, but expect a faint coconut flavor and slightly different texture; adding one extra egg white can improve lift in that case.

Serving Suggestions

Serve plain for a light dessert, or dust with a little powdered sugar substitute if desired. Fresh berries or a warm berry compote contrast beautifully with the lemon and yogurt tang. A spoonful of macerated peaches in summer or lightly sugared orange segments in winter elevates each slice. For a brunch spread, plate with whipped cream or mascarpone and a scattering of toasted nuts for crunch. The cake also pairs well with a cup of strong coffee or a delicate green tea.

Cultural Background

Flourless and dairy-forward cakes have roots across Europe and the Mediterranean, where recipes often rely on eggs and ground nuts or dairy for structure. This version is inspired by Spanish and Portuguese simple sponge traditions that emphasize egg-whipped textures, but reinterprets them to avoid wheat and refined sugar. The use of yogurt is common in Eastern European and Middle Eastern bakes as a tenderizer and flavor enhancer, lending a pleasant acidity that balances sweetness. Over time home bakers have adapted these ideas to suit dietary preferences and modern pantry staples.

Seasonal Adaptations

In spring and summer, fold in a handful of chopped fresh strawberries or raspberries before folding in the final egg whites for pops of color. In autumn, replace lemon zest with a teaspoon of ground cinnamon and a splash of orange extract, or fold in a tablespoon of pumpkin purée and a pinch of nutmeg for seasonal warmth. For winter holidays, add a teaspoon of finely grated orange zest and a tablespoon of candied ginger for a festive touch. Adjust sweetness to taste depending on additions.

Meal Prep Tips

Make the batter in the morning and bake later in the day for fresher texture at serving time. If prepping ahead, bake, cool, and store whole in the refrigerator; slice just before serving to preserve edges. For individually portioned breakfasts, slice and wrap pieces in parchment and refrigerate — heat gently in the microwave for 10–15 seconds or in the oven at low heat for a few minutes. This cake’s compact size and stable crumb make it excellent for packed brunch boxes and small gatherings.

This lemon yogurt cake is a small, bright reminder that simple ingredients and a gentle hand can produce something memorable. It’s forgiving, adaptable, and consistently loved — make it your own, and enjoy the notes of citrus and cream that shine through each airy slice.