Directions

Preheat oven to 350

Make the whole orange cake
1. Prepare a 8 in pan by spraying with oil (or butter) and lining in parchment paper , then spray the paper, too.
2. Place the sugar and eggs in a large bowl and beat with a mixer until light and fluffy.
3. Sift the flour and protein powder with the baking powder then add to the mixture in the bowl a little at a time along with the softened butter. Continue to mix until completely blended, then stir in the yogurt.
4. In a food processor, process the whole orange until it is almost pureed.
5. Add this orange to the cake mixture and stir until evenly combined, then put the batter into the prepared tin.
6. Bake for 50-60 minutes (depending on your oven), but test with a skewer to make sure the orange cake is done before removing from the oven. Allow to cool for about 15 minutes, then remove the side of the springform pan.

Make the orange glaze
1. Prepare the glaze by melting the sugar in the orange juice and allow to simmer for a few minutes, just until the liquid has a syrupy consistency.
2. Spoon and brush over top of the cake and allow to cool completely before cutting.