Name: Banana Cake with Spiced Vanilla Buttercream
Ingredients: 3/4 cup unsalted butter, at room temperature; 2 cups sugar; 3 large eggs; 1 tsp vanilla; 1 tsp cardamom; 2 very ripe bananas, mashed; 2 tsp lemon juice; 3 cups all purpose flour; 1 1/2 tsp baking soda; 1/4 tsp salt; 1 1/2 cups buttermilk; spiced frosting; 1/2 cup (1 stick) unsalted butter, at room temperature; 8 oz (1 container) mascarpone cheese, at room temperature (you can substitute cream cheese); 1 tsp vanilla extract; 1/4 tsp ground cloves (you can add more if you like); up to 4 1/2 cups confectioner's sugar