Preheat the oven to 150 degrees. Grease and flour a brownie pan and keep ready.
Mix the butter and condensed milk till well combined.
Add all the dry ingredients and mix till there are no lumps.
Finally add in the coke and stir to mix well.
Pour the batter into the prepared tin and tap to distribute evenly.
Bake in the oven for 60 minutes or till done.
Cool in pan for 10 minutes before flipping onto a cooling rack, to cool completely.