For cake, preheat the oven to 325°F. Prepare a 10-12 cup bundt cake by spraying with non-stick baking spray.
In a large bowl, whisk together flour, baking powder, baking soda, cinnamon, ground ginger, nutmeg, and salt. Set aside.
3 cups (423g) all-purpose flour, 2 teaspoons baking powder, 1/2 teaspoon baking soda, 1 teaspoon ground cinnamon, 1 teaspoon ground ginger, 1/4 teaspoon ground nutmeg, 1/2 teaspoon salt
In a large bowl of a stand mixer, combine oil, brown sugar, granulated sugar, sour cream, and vanilla. Beat well for 2 minutes.
1 cup vegetable oil, 1 cup (200g) light brown sugar, 1/2 cup (100g) granulated sugar, 1/2 cup sour cream, 2 teaspoons pure vanilla extract
Add eggs one at a time, mixing after each addition.
3 large eggs
Stir in flour mixture until just combined. Then fold in pears and crystallized ginger. Do not over mix. Transfer batter to prepared pan.
2 medium Bosc pears, 1/4 cup minced crystallized ginger
Bake for 55-70 minutes or until a toothpick inserted in the center of the cake comes out clean.
Let the cake rest for 15 minutes in the pan before turning out onto a cake plate.
To prepare glaze, combine powdered sugar, cinnamon, ground ginger, vanilla extract, and pear juice/pear nectar/milk in a bowl. Whisk until smooth.
1 1/2 cups (180g) powdered sugar, 1/4 teaspoon ground cinnamon, 1/4 teaspoon ground ginger, 2 teaspoons pure vanilla extract, 3-4 Tablespoons pear juice
Drizzle glaze over cooled cake, then let set for 1 hour before slicing and serving.