A tender, buttery blueberry cake bursting with fresh berries, perfect for dessert or brunch.
1. If you don't have buttermilk, make a quick substitute: add 1 1/2 teaspoons of lemon juice or vinegar to 1/2 cup of milk, let it sit for 5 minutes, then use as directed.
2. To make this dairy-free, use vegan butter, oat milk mixed with lemon juice, and a flax egg (1 tablespoon ground flaxseed + 3 tablespoons water per egg).
3. Store leftover cake in an airtight container at room temperature for up to 3 days, or freeze for up to 3 months.
4. For a lemon glaze, whisk 1 cup powdered sugar with 2 tablespoons lemon juice and drizzle over the cooled cake.