Sift the flour, baking powder and salt together in a bowl. Set aside.

Beat the butter and sugar until light and fluffy. Add the eggs, one at a time, beat on medium high speed until combined.

Add the dry ingredients in 3 additions and mix until incorporated. Do not over mix.

Remove one cup of yellow batter and pour into a bowl. Add the cocoa powder and flavor into the 1 cup of yellow batter you set aside and stir until combined.

Add the butterscotch flavor to the remaining yellow batter and stir. Pour an even layer of the yellow batter into the cake pan.

Spoon chocolate batter on top. Pour remaining yellow batter on top of the chocolate. Using a knife or toothpick, swirl the two batters together.

Bake for 22-30mins or until a toothpick inserted into the center comes out clean.