How to Make It
Preheat oven to 350°.
Beat first 3 ingredients in a large bowl with a mixer at medium speed until well-blended. Add molasses; beat 1 minute. Lightly spoon flours into dry measuring cups; level with a knife. Combine flours and next 4 ingredients (flours through allspice) in a small bowl, stirring well with a whisk. Add flour mixture and buttermilk alternately to sugar mixture, beginning and ending with flour mixture; beat well after each addition
Pour batter into an 8-inch round cake pan coated with cooking spray; sharply tap pan once on counter to remove air bubbles. Sprinkle with crystallized ginger. Bake at 350° for 25 minutes or until cake springs back when touched lightly in center. Cool in pan 10 minutes on a wire rack. Remove from pan; serve warm.