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Prep Time: 15 minutes
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Cook Time: 45 minutes
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Total Time: 1 hour
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Servings: 10 slices
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Difficulty: Easy (Beginner-friendly)
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Intensity: Low (Minimal steps, one-bowl method)
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Dietary Info: Diabetic-Friendly, Sugar-Free, Gluten-Free, Grain-Free
Nutritional Information (Per Slice, approximate)
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Calories: 210
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Total Fat: 16g
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Saturated Fat: 2g
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Total Carbohydrates: 12g
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Dietary Fiber: 3g
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Net Carbs: 9g
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Protein: 7g
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Sodium: 85mg
Important Note: The net carbohydrate count is diabetic-friendly, but individual blood sugar responses can vary. Always consult your healthcare plan and monitor your levels.
Ingredients
For the Cake:
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2 medium oranges (approx. 300g total, Navel or Valencia work well)
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3 large eggs
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1 ½ cups (150g) super-fine almond flour
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½ cup (100g) granulated erythritol (or your preferred diabetic-friendly sugar substitute like monk fruit blend, measure-for-measure like sugar)
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1 tsp baking powder (ensure gluten-free if needed)
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½ tsp pure vanilla extract
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A pinch of salt
For the Optional Glaze:
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3 tbsp powdered erythritol (confectioners style)
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1-2 tsp fresh orange juice
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½ tsp orange zest
Equipment
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Medium saucepan
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Blender or food processor
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Mixing bowl
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8-inch (20cm) round cake pan
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Parchment paper
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Cooling rack
Step-by-Step Instructions
Step 1: Cook the Oranges (15 minutes)
Place the whole, unpeeled oranges in a saucepan and cover completely with water. Bring to a boil, then reduce heat and simmer, covered, for 15 minutes. This process softens the oranges, removes any bitterness from the peel, and infuses the entire fruit with moisture. Drain and let them cool slightly. This step can be done a day ahead for even easier prep!
Step 2: Prepare the Oven & Pan (5 minutes)
While the oranges cool, preheat your oven to 350°F (175°C). Line the base of your cake pan with parchment paper and lightly grease the sides. This ensures your cake will release perfectly.
Step 3: Create the Batter (5 minutes)
Cut the cooled oranges into quarters, removing any obvious seeds. Place the orange quarters (skin and all!) into your blender or food processor. Blend until a smooth, lump-free puree forms. Add the eggs, erythritol, and vanilla extract to the blender. Pulse a few times until the mixture is well combined and frothy.
Step 4: Mix Dry Ingredients (2 minutes)
In your mixing bowl, whisk together the almond flour, baking powder, and salt. Pour the wet orange and egg mixture from the blender into the dry ingredients. Gently fold with a spatula until just combined and no dry streaks remain. The batter will be relatively thick and fragrant.
Step 5: Bake (45 minutes)
Pour the batter into your prepared pan, smoothing the top. Bake in the preheated oven for 40-45 minutes, or until the top is golden brown, firm to the touch, and a skewer inserted into the center comes out clean.
Step 6: Cool & Serve (30 minutes minimum)
This is a crucial step for texture. Let the cake cool in the pan for 15 minutes. Then, gently run a knife around the edge and invert it onto a cooling rack. Peel off the parchment paper and allow it to cool completely—at least 30 minutes. The cake firms up as it cools, making it easier to slice.
Step 7: Optional Glaze (2 minutes)
If using, whisk the powdered erythritol with just enough orange juice to create a drizzle-able consistency. Stir in the zest. Drizzle artistically over the completely cooled cake.
Storage & Shelf Life
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Lasting Quality: This cake stores exceptionally well due to its moisture content.
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Room Temp: Keep in an airtight container for up to 2 days.
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Refrigerator: Store for up to 5 days. The flavors deepen, making it even more delicious.
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Freezer: Wrap individual slices or the whole cake tightly and freeze for up to 3 months. Thaw overnight in the refrigerator.