White Christmas Cranberry Layer Cake

1. Preheat oven to 350 degrees F. Grease 2 (8-inch) round cake pans. Line with parchment paper, then butter/spray with cooking spray.
2. In the bowl of a stand mixer (or use a hand-held mixer) beat together the canola oil, yogurt, eggs, brown sugar, vanilla, and eggnog (or buttermilk). Add the flour, baking soda, baking powder, and salt. Mix until just combined. 
3. Pour the batter among the cake pans and bake 30-35 minutes, until the tops are just set and no longer wiggly in the center. Remove and let cool five minutes, then run a knife around the edges of the pan and turn the cakes out onto a cooling rack. Cover and let the cakes cool completely before assembling.
4. To make the jam. Add the cranberries, maple syrup, and orange juice to a medium-size pot set over high heat. Bring the mixture to a boil, once boiling use a fork to break down the cranberries a bit. Continue to cook for 10 minutes or until the jam has reduced and thickened by 1/3. Stir in the vanilla, ginger, and cinnamon. Remove from the heat and let cool. 
5. To make the buttercream. Add the butter and powdered sugar to the bowl of a stand mixer. Beat the butter and powdered sugar together until the butter is light and fluffy. Add the melted white chocolate and vanilla and beat until combined.
6. To assemble. Using a large serrated knife, carefully cut each cake in half horizontally. Place one cake layer on a serving plate. Spread 1/4 of the buttercream over the cake and layer with about 1/3 cup of jam. Repeat with the remaining 3 cake layers. Be careful not to over fill your layers or the cake will be hard to slice. Lightly frost the outside of the cake. Chill 30 minutes. Serve or store in the fridge for up to 3 days. Before serving, decorate with sugared cranberries, coconut, and rosemary, if desired.