Pastel de Batata

• 4 oz. unsalted butter
• 2 cups sweet potato paste (Boniatillo)

Melt the butter, and beat it into the sweet potato paste. Add the vanilla. Beat the egg yolks thoroughly and add. Sift the flour with the baking powder and add. Beat the egg whites with a pinch of salt until stiff and fold into the potato mixture gently but thoroughly. Pour into a buttered 3-pint soufflé dish, and bake in a