
Rich, deeply chocolatey, and crowned with a glossy ganache, this two-layer cake is the kind of showstopper that makes people ask for the recipe before they've even finished their slice — and then do a double-take when they hear it's completely plant-based. A flaxseed gel stands in for eggs, doing a quiet but impressive job of binding the batter and keeping every crumb tender and moist. Plant-based milk spiked with apple cider vinegar creates a quick vegan buttermilk that reacts with the baking soda for a beautifully lifted, soft crumb, while a cup of hot water thins the batter just enough to make it perfectly pourable. Toasted hazelnuts folded right into the layers add crunch and a nutty warmth that plays off the unsweetened cocoa in the best possible way. The frosting is a simple stovetop ganache made from dairy-free chocolate chips and full-fat coconut milk — it sets up thick, glossy, and indulgent without a drop of butter or cream. This recipe yields 12 generous servings, making it ideal for birthdays, dinner parties, or any occasion where you want to prove that skipping animal products doesn't mean skipping decadence.
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Preheat the oven to 350°F (175°C). Grease two 9-inch round cake pans and line the bottoms with parchment paper.
In a small bowl, stir together the ground flaxseed and 6 tbsp water until combined. Set aside for 5 minutes until the mixture thickens to a gel.
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