Mix the dry and egg mixture

• In a bowl, mix together the eggs, cocoa powder, salt, baking powder, espresso powder and vanilla extract.

Cream the butter and sugar

• In a separate bowl, cream the butter and sugar.
• Microwave gradually in 15-second bursts until the sugar dissolves and the mixture is shiny.

Make the batter

• Combine the egg mixture and the butter mixture well.
• Add the flour and mix gently without overmixing.

Layer the brownies

• Pour half the batter into a 9x9 baking dish.
• Cover with the melted Nutella and the chopped Ferrero Rocher.
• Top with the remaining batter.

Bake

• Bake at 180 °C for 28-32 min.

Finish and serve

• Once out of the oven, top with the remaining whole Ferrero Rocher.
• Optionally drizzle with more melted Nutella.