Chocolate Mocha Brownies

Anyone can make a good brownie. But here's the recipe for GREAT brownies: Crumbly on top, gooey in the centre, and with a hit of espresso-awesomeness. Better the next day, though they never live that long! You'll need:

• 275 g Butter (Softened)
  
• 375 g Caster sugar
  
• 4 Eggs
  
• 100 g Self-raising flour
  
• 75 g Cocoa powder
  
• 2tsp Espresso coffee powder
  
• 100g Plain/Dark Chocolate bar