Generously grease Bundt pan (9in x 3in) with butter and pre heat oven at 180°C/356°F.
Sift cake flour, baking powder, baking soda and salt in a mixing bowl and set aside.
3 cups cake flour, 2 tsp baking powder, 1 ½ tsp baking soda, ¼ tsp salt
Beat butter and sugar using a stand mixer until light and fluffy. Add 4 eggs two at a time and beat until incorporated.
225 grams butter, 2 cups sugar, 4 medium eggs
In a small bowl mix coconut milk and ube food coloring or ube flavor.
1 ½ cup coconut milk, 1 ½ tsp ube flavoring
Add the flour mixture in 3 batches while pouring ube coconut milk mix in 2 batches in between. Beat until no traces of flour is left.
Transfer cake batter into the Bundt pan and bake for 45 minutes or until inserted toothpick comes out clean. Completely cool down