Preheat your oven to 180°C.
Line a small baking pan (around 6x6 inches, or similar) with parchment paper. Leave a bit of overhang to lift the brownies out later.
In a heatproof bowl, combine 75g chopped dark chocolate and melted butter.
75 g dark chocolate, 45 g butter
Melt together gently — either in short bursts in the microwave or over a pot of simmering water (double boiler).
Stir until smooth, then mix in the coffee powder. Set aside to cool slightly.
¼ tsp coffee powder
Whisk in the brown sugar and white sugar until combined.
35 g brown sugar, 35 g white sugar
Add the egg and vanilla extract and whisk well for about 1 minute, until the mixture is glossy and slightly thickened.
1 room temperature egg, 1 tsp vanilla extract
Sift in the flour, pinch of salt and cocoa powder.
50 g all purpose flour, A pinch of salt, 1 tbsp cocoa powder
Gently fold the dry ingredients into the wet ingredients until just combined — do not overmix.
Stir in 30–40g chocolate chips or chopped chocolate.
30 –40g chocolate chips or chopped dark/milk chocolate
For extra gooey spots, reserve a few pieces and press them on top of the batter after pouring it into the pan.
Pour the batter into your prepared pan and spread it evenly.
Bake for 18-22 minutes, or until the center is just set and a toothpick inserted comes out with a few moist crumbs (not wet batter).
Allow brownies to cool completely in the pan before cutting.
Slice into small squares and enjoy rich, fudgy goodness!