How to Bake Kefir Sheet Cake

Ingredients

• 2 cups (240g) all-purpose flour
• 1 ½ cups (300g) granulated sugar
• 1/2 cup (115g) unsalted butter, softened
• 1 cup (240ml) plain kefir
• 3 large eggs
• 1 tsp vanilla extract
• 1 tsp baking powder
• 1 tsp baking soda
• 1/4 tsp salt
• 1 cup (120g) powdered sugar (for optional glaze)
• 2-3 tbsp milk or kefir (for optional glaze)
• 1 tsp vanilla extract (for optional glaze)