Lemon-Ginger Spice Cakes - The Perfect Puree of Napa Valley

Ingredients

• 3 tbsp. The Perfect Purée Sweet Ginger, thawed
• 1 tbsp. The Perfect Purée Lemon Zest, thawed
• 1 cup + 3 tbsp. sifted flour
• 1 tsp. ground ginger
• ¼ tsp. fresh grated nutmeg
• ¼ tsp. salt
• ¼ tsp. baking soda
• ⅛ tsp. baking powder
• 6 tbsp. unsalted butter, at room temperature
• ⅔ cup sugar
• ½ tsp. vanilla
• 1 large egg
• ½ cup sour cream