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Preheat your oven to 350°F (175°C). Grease and flour an 8-inch round cake pan or line it with parchment paper.
In a blender or food processor, add the whole orange (peel included), eggs, sugar, and oil. Blend until smooth and fully combined.
In a large mixing bowl, whisk together the flour, baking powder, and salt. Gradually add the orange mixture to the dry ingredients, stirring just until combined. Do not overmix.
Pour the batter into the prepared cake pan and smooth the top.
Bake for 40-50 minutes, or until a toothpick inserted in the center comes out clean.
Allow the cake to cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
Optional Glaze: In a small bowl, whisk together powdered sugar and orange juice to make a smooth glaze. Drizzle over the cooled cake and sprinkle with orange zest before serving.
Prep Time: 10 minutes | Cooking Time: 45 minutes | Total Time: 55 minutes
