Preheat oven to 350°F. Grease and flour a 9.5-inch bundt pan.
In a medium bowl, whisk together the flour, baking powder, and salt.
In a large bowl, cream the butter and sugar until light and fluffy, about 3 minutes.
Beat in eggs one at a time, then stir in vanilla extract.
Mix in half of the dry ingredients, then the milk, followed by the remaining flour, stirring until just combined.
Add-ins
Fold in white chocolate chips, coconut, cranberries, and walnuts until evenly distributed.
Baking
Pour batter into the prepared pan and smooth the top.
Bake for 55 to 65 minutes, until a toothpick inserted in the center comes out clean.
Cool in the pan for 10 minutes, then invert onto a wire rack to cool completely.
Notes
For best results, chill the batter for 10 minutes before baking to keep the add-ins suspended.Store slices in an airtight container at room temperature for up to 3 days or freeze for up to 3 months.