Preheat your oven to 350°F (175°C) and prepare an 8-inch springform pan by greasing with butter and lining with parchment.

Combine 4 eggs with 1 cup of sugar in a large bowl and beat until light and fluffy, about 5 minutes.

Sift together 2 cups of flour and 2 teaspoons of baking powder, then gradually fold into the egg mixture, adding ½ cup butter until well combined.

Process one whole organic orange in a food processor until mostly pureed and add to the batter, mixing until fully incorporated.

Pour the batter into the prepared pan and bake for 50-60 minutes or until a toothpick comes out clean.

Cool the cake in the pan for 10-15 minutes, then release from the pan and transfer to a wire rack to cool completely.

Make the glaze by simmering ½ cup of orange juice and ½ cup sugar in a saucepan until thickened, about 5-7 minutes.

Brush the warm glaze over the cooled cake, allowing it to soak in, then let cool completely before slicing.