Easy & Moist Bake Kefir Sheet Cake with Zesty Lemon

Ingredients

• 2 cups (240g) all-purpose flour
• 1 ½ tsp baking powder
• ½ tsp baking soda
• ½ tsp salt
• ½ cup (115g) unsalted butter, softened
• 1 cup (200g) granulated sugar
• 2 large eggs
• 1 cup (240ml) plain kefir
• 1 tbsp lemon zest (about 1 lemon)
• 1 tsp vanilla extract
• 1 cup (120g) powdered sugar
• 2-3 tbsp fresh lemon juice (adjust for consistency)
• ½ tsp lemon zest (optional, for garnish)