Easy Grapefruit Olive Oil Cake

slice of grapefruit olive oil cake with a gold fork on a plate.

5 from 1 reviews

A simple and flavorful winter grapefruit olive oil cake that's delicious enough for dessert, but healthy enough for breakfast - no frosting required. (dairy-free, nut-free)


  • 2 tbsp grapefruit zest
  • 1 cup freshly squeezed ruby red grapefruit juice
  • 1 3/4 cup white whole wheat flour (or all-purpose flour - see notes)
  • 1 tsp baking powder
  • 1/2 tsp sea salt
  • 3 large eggs
  • 1 1/4 cups granulated sugar
  • 1/2 tsp vanilla extract or vanilla bean paste
  • 3/4 cup mild flavored olive oil


  1. Heat oven to 350°F. Grease a 9" springform pan or round can pan with oil and line the bottom with parchment. (See notes for metal pan.)
  2. Zest grapefruit to yield 2 tbsp zest. Be careful to only get the colored part, as the white section will be bitter.
  3. Juice the grapefruit to yield 1 cup of juice (it took me 1 1/2 grapefruits). Whisk in the olive oil and set aside.
  4. In a medium bowl, sift together flour, baking powder and salt. Stir in grapefruit zest. Set aside.
  5. In a large bowl, whisk eggs well. Add sugar and vanilla and whisk until light and fluffy.
  6. Slowly alternate adding flour and grapefruit mixtures to egg mixture while continuing whisk until just mixed.
  7. Pour batter into prepared pan.
  8. Bake 50-60 minutes, or until a toothpick inserted into the center comes out clean.
  9. Remove from oven to cool. Once cooled, invert the pan onto a serving platter.
  10. Optional: Sprinkle with powdered sugar and serve with fresh grapefruit sections.


  • If you're using a dark metal pan, lower the temperature to 325°F to prevent the edges from burning.
  • If using all-purpose flour, decrease grapefruit juice by 2 tbsp.
  • Use freshly squeezed grapefruit juice for the best flavor.
  • The grapefruit juice and olive oil don't have to be completely mixed, they just need to be in the same container.
  • Careful not to over-mix when adding the flour. It should be just combined.
  • Line the bottom of your pan with parchment paper to make it easier to turn the finished cake out.

Keywords: easy grapefruit olive oil cake