2 1/2 cups all-purpose flour

2 teaspoons baking powder

3/4 teaspoon baking soda

1/2 teaspoon salt

2 teaspoons ground cinnamon

1/2 teaspoon ground nutmeg

1 cup vegetable oil

1 1/4 cups packed light or dark brown sugar

1/2 cup granulated sugar

1 cup unsweetened applesauce at room temperature

4 large eggs at room temperature

1 tablespoon pure vanilla extract

1 3/4 cups shredded zucchini (with peel, no need to blot)

1/4 cup unsalted butter, cut into 4 slices

8 ounces full-fat cream cheese, softened at room temperature

2 1/2 cups confectioners’ sugar

1 teaspoon pure vanilla extract

Pinch of salt