Preheat the oven to 350 degrees F (175 degrees C). Grease and flour a 10-inch Bundt or tube pan.

Cream butter and Neufchâtel cream cheese in a stand mixer until creamy. Add brown and white sugar and continue to beat until fluffy. Add eggs one at a time, beating well after each addition. Mix in sweet potato puree until well incorporated.

Combine cake flour, baking powder, baking soda, cinnamon, nutmeg, ginger, and salt in a bowl. Slowly add flour mixture to sweet potato mixture. Mix until well combined. Beat in vanilla extract. Pour batter into the prepared baking pan.

Bake in the preheated oven until a toothpick inserted in center comes out clean, 75 to 85 minutes. Let cool in the pan for 20 minutes, then turn out onto a wire rack and cool completely.