Preparation Preheat oven to 350°F. Butter and flour pan; set on a rimmed baking sheet. Whisk 2 1/4 cups flour and next 6 ingredients in a medium bowl. Using an electric mixer, beat 1/2 cup butter and sugar until fluffy, about 3 minutes. Add sour cream; beat to blend. Add cane syrup and 1/2 cup hot water; beat until smooth. Beat in eggs one at a time; blend well between additions. Add ginger. Beat in dry ingredients in 3 additions on low speed. Add buttermilk; beat just to blend. Pour into pan; smooth top. Bake until a tester inserted into center of cake comes out clean, about 30 minutes. Let cool completely. Dust with powdered sugar before serving.
Preparation Preheat oven to 350°F. Butter and flour pan; set on a rimmed baking sheet. Whisk 2 1/4 cups flour and next 6 ingredients in a medium bowl. Using an electric mixer, beat 1/2 cup butter and sugar until fluffy, about 3 minutes. Add sour cream; beat to blend. Add cane syrup and 1/2 cup hot water; beat until smooth. Beat in eggs one at a time; blend well between additions. Add ginger. Beat in dry ingredients in 3 additions on low speed. Add buttermilk; beat just to blend. Pour into pan; smooth top. Bake until a tester inserted into center of cake comes out clean, about 30 minutes. Let cool completely. Dust with powdered sugar before serving.