Melt the chocolate and butter together in a saucepan over a medium heat.
2. Step
Stir in the cocoa powder, sugar, and vanilla extract.
3. Step
Take off the heat and whisk in the eggs one at a time.
4. Step
Tear off a piece of greaseproof paper and scrunch into a small ball.
5. Step
Pre-heat the oven to 350°F (180°C).
6. Step
Place the the paper balls in the centre of each hole in a muffin tin. Pour the chocolate doughnut mixture in the muffin tin holes, circling around the paper balls and being careful not to cover them.
7. Step
Bake in the oven for 8-10 minutes.
8. Step
Carefully take the doughnuts out of the muffin tin. Take out the paper balls with your fingers. You should have a circle-shaped hole in each doughnut.
9. Step
Dip in some melted chocolate, followed by some sprinkles.
