Step 1

Prepare the Cake: Preheat oven to 350°F. Generously spray a 15-cup Bundt pan with baking spray. Whisk together flour, baking powder, cinnamon, baking soda, nutmeg, and salt in a medium bowl. Set aside.

Step 2

Beat eggs, oil, buttermilk, and brown sugar in a large bowl with an electric mixer on medium speed until smooth, about 1 minute. Add flour mixture, beating on low speed until blended, about 1 minute. Fold in carrots, pecans, and crystallized ginger until evenly combined. Pour batter into prepared pan; shake pan lightly to even out batter and release any air bubbles.

Step 3

Bake in preheated oven until a wooden pick inserted in center comes out clean, about 55 to 60 minutes, rotating pan on rack halfway through baking time. Let cake cool in pan on a wire rack 10 minutes. Invert cake onto wire rack to cool completely, about 1 hour and 30 minutes.

Step 4

Prepare the Frosting: Beat cream cheese and butter in a large bowl with an electric mixer on medium speed until light and fluffy, about 2 minutes. Gradually add powdered sugar, beating on low speed until mixture is smooth, about 1 minute. Add maple syrup, and beat on medium speed until light and fluffy, about 1 minute. Spoon frosting into a ziplock freezer bag or piping bag. Cut a 1-inch hole in 1 corner of bag, and pipe frosting in large loops around top and sides of cake. If desired, top with carrot chips. Garnish with additional chopped toasted pecans and crystallized ginger.