Preheat your oven to 180ºc/160ºfan and line a 9″ square baking tray with parchment paper.
Melt together the unsalted butter and dark chocolate in a heatproof bowl over a pan of boiling water, or in the microwave for short bursts until melted.
Leave to the side to cool to room temperature.
Using an electric whisk/stand mixer, whisk together the eggs & caster sugar for a few minutes until the colour has turned pale, is very mousse like, and is double the original volume of the amount of eggs + sugar!
When whisked, pour the cooled chocolate mix & all of your Baileys over the egg and caster sugar mix and fold together carefully. It might take some time, but be patient – you don’t want to knock out the air you made up on the previous step!
Add the cocoa powder and plain flour on top of the chocolate mix and then fold together again – still being careful to not knock out the air!
Once combined well, fold through the chocolate chips.
Pour into your prepared tin and smooth over.
Bake in the oven for 25-30 minutes, until there is an ever so slight wobble in the middle.
Once baked, leave to cool in the tin completely.
Baileys Ganache
Add the dark chocolate and baileys into a jug
Heat on a low heat in the microwave (or in a pan), and stir often until smooth.
Spread the ganache onto the brownies and then set the brownies in the fridge overnight for best results.
Notes
I used normal flavoured Baileys in this recipe, but you could easily use any flavour that you want such as the chocolate one! Or any other alternative Irish alcoholic cream!
These will last in an airtight container for 1 week, but I very much doubt they will last that long.
You can just slap on the frosting and then cut the squares, but I wanted mine to look neater as they were for a party!
Recipe updated June 2022 - original recipe used a chocolate baileys frosting using 135g unsalted butter, 275g icing sugar, 25g cocoa powder and 3tbsp baileys.