Step 1

In a large bowl, mix together flour, both sugars, baking powder, baking soda, and salt.

Step 2

Place into a sealable bag and store for up to 2 months.

Step 3

To make a cake: Preheat oven to 350F (180oC). Grease and line a 2x 9-inch cake tins or 3 6-inch cake tins.

Step 4

Into the dry cake mix, whisk in the eggs, oil and buttermilk until combined. Add in vanilla extract if desired.

Step 5

Stir the wet ingredients into the dry ingredients and mix to form a smooth batter.

Step 6

Pour batter into prepared cake tins. Bake for 35-40 minute or until a toothpick inserted in the center comes out clean. Allow to cool.

Step 7

Store for up to 2 months or freeze for up to 4 months.