Preheat oven to 180°C (350°F).

Prepare a 5-inch round pan, a 9-inch round pan, or a 9-inch loaf pan.

Sieve all-purpose flour, whole wheat flour, baking powder, baking soda, and salt in a mixing bowl.

Set dry ingredients aside.

In another mixing bowl, beat eggs until fluffy.

Add sugar, oil, warmed and cooled marmalade, and orange juice to the eggs and whisk until blended.

Gradually fold the dry ingredients into the wet ingredients, alternating with buttermilk.

Pour batter into the prepared pan.

Bake for 30-35 minutes, or until a cake tester comes out clean.

Invert the cake onto a cooling rack after 5 minutes and let cool completely.

Run a knife around the edges of the pan to loosen the cake if needed.

Drizzle warmed marmalade over the cake.

Serve with coffee or Masala chai.