Method
1. Pre-heat oven - 180°C
2. Add unsalted butter to a clean small glass bowl
3. Melt in microwave and set aside - low heat
4. Add ground almonds, gluten-free flour, cocoa powder, salt and powdered sugar to a clean medium bowl
5. Whisk together until blended
6. Add egg white to a clean large mixing bowl
7. Whisk until stiff peaks form
8. Transfer dry ingredients to batter
9. Fold together until combined
10. Transfer content of small glass bowl to batter
11. Mix gently until just combined
12. Spoon batter into muffin pan
13. Bake until springy to touch - 15 min, 180°C
14. Let cool - 5 min
15. Transfer onto cooling rack
16. Add dark chocolate to a clean small glass bowl
17. Melt in microwave
18. Drizzle muffins with chocolate mixture
19. Sprinkle with cacao nibs