Perfect One-Bowl Lemon Birthday Sheet Cake

Ingredients

• 3 cups organic cake flour
• 3 large organic eggs, room temp
• 1 cup plant-based 'buttermilk
• 5 cups organic powdered sugar, sifted
• 2-3 Tbsps Almond milk
• 1 Tbsp lemon zest
• 2 tsps vanilla extract
• 1/2 tsp sea salt
• 1 cup Rainbow Sprinkles
• 1 cup unsalted butter, softened at room temp
• 1 1/2 tsps lemon extract or lemon juice
• 1 tsp lemon extract or lemon juice
• 1 Tbsp baking powder
• 1 1/2 cups organic pure cane sugar