
Classic yellow cake is one of those recipes that feels almost impossible to pull off without butter and milk — but this version proves that wrong in the most delicious way. Dairy-free butter and oat milk stand in seamlessly for their conventional counterparts, and a tablespoon of apple cider vinegar stirred into the oat milk creates a quick homemade "buttermilk" that keeps the crumb incredibly tender and moist. The creaming method — beating the dairy-free butter and sugar until pale and fluffy before adding eggs one at a time — builds the same light, golden structure you'd expect from a traditional layer cake. Alternating the dry ingredients with the oat milk mixture ensures everything comes together without overmixing, so each slice stays soft rather than dense or gummy. The frosting follows the same logic: whipped dairy-free butter, sifted powdered sugar, a splash of oat milk, and vanilla beat up into something genuinely fluffy and spreadable. With 12 servings, this two-layer cake is built for celebrations, and nobody at the table will suspect it skips conventional dairy entirely.
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Preheat the oven to 350°F (175°C). Grease two 9-inch round cake pans with dairy free butter or cooking spray, line the bottoms with parchment paper, and grease the parchment.
In a small bowl or measuring cup, stir together the oat milk and apple cider vinegar and set aside for 5 minutes until slightly curdled.
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