Preheat oven to 180'C, line your muffin tin (it'll make 10 muffin-sized cake) or bun tin (makes 24).
Whisk everything apart from the choc chips together, with electric mixer until smooth with no lumps.
Gently fold in the choc chips.
Fill the tin to half or 2/3 full (tops!), otherwise it'll all spill out!
Bake for 20 mins if you're using a muffin tin, or 12 minutes if you're using a bun tin.
To test if they are cooked, stick a skewer in and if it comes out clean, it's cooked! Or when it springs back after you pressed it lightly. If it's not cooked, back in the oven for another 3 mins.
Take them out of the oven. Wait for a minute or two then lift them out onto a cooling rack.