Lazy Keto Mug Brioche with a Melted Chocolate Center

Macros (entire brioche):\
~380 kcal – 30.5g fat – 5.6g net carbs – 20.2g protein

Ingredients (serves 1)

• 25g almond flour – 149 kcal | 13.1g fat | 2.2g net carbs | 5.3g protein
• 10g vital wheat gluten – 37 kcal | 0.1g fat | 0.6g net carbs | 7.5g protein
• 3g coconut flour – 11 kcal | 0.3g fat | 1g net carbs | 0.5g protein
• 1 egg – 72 kcal | 5g fat | 0.4g net carbs | 6.3g protein
• 25ml heavy cream – 73 kcal | 7.3g fat | 0.7g net carbs | 0.5g protein
• 15g erythritol – 0 kcal | 0g fat | 0g net carbs | 0g protein (not counted in net carbs)
• 1 pinch baking powder – negligible
• 1 pinch salt – negligible
• 1/2 tsp vanilla extract – negligible
• 10g melted butter – 74 kcal | 8.2g fat | 0g net carbs | 0.1g protein
• Optional: 5g chopped hazelnuts – 33 kcal | 3.2g fat | 0.2g net carbs | 0.8g protein
• Filling: 10g dark chocolate (85%) – 61 kcal | 5.3g fat | 1.5g net carbs | 0.9g protein

Instructions

1. In a bowl, whisk the egg, heavy cream, sweetener, salt, vanilla, and melted butter until well combined.
2. Add almond flour, coconut flour, gluten, baking powder, and chopped hazelnuts. Mix until the batter is smooth and slightly thick.
3. Grease a microwave-safe mug or ramekin with a bit of butter.
4. Pour in half of the batter, drop the chocolate square in the center, and cover with the remaining batter.
5. Microwave for 60 seconds at medium power (around 700W), or adjust timing based on your microwave. The brioche should rise and set but remain soft.
6. Let it rest for 30 seconds, then gently unmold.
7. Optional but highly recommended: finish in the air fryer at 180°C (355°F) for 3 to 5 minutes to get a golden, slightly crisp exterior.

Texture nailed : soft, bready, slightly chewy, with the added crunch of hazelnuts — and the center turns into a molten pool of dark chocolate. Best served warm. Perfect for a quick sweet snack.

I just wish I'd caught that moment when the chocolate melt and ooze out, but nope.