How to Bake Kefir Sheet Cake

Ingredients

• 2 cups (250g) all-purpose flour
• 1 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/4 teaspoon salt
• 1 cup (240ml) unsweetened kefir
• 3/4 cup (150g) granulated sugar
• 1/3 cup (80ml) vegetable oil or melted coconut oil
• 2 large eggs
• 1 teaspoon vanilla extract
• 1/2 cup (115g) unsalted butter, softened
• 1/4 cup (60ml) heavy cream
• 2 cups (240g) powdered sugar
• Optional: Fresh berries for garnish