- STEP 1
Preheat oven to 180 degrees Celsius/ gas mark 4. Line several large baking sheets with baking paper.
- STEP 2
Place the butter and sugars in a large bowl and whisk together until pale and creamy. Whisk the eggs and vanilla extract into the mixture until smooth. Sift in the flour and bicarbonate of soda and beat together until well mixed. Stir in the chocolate chunks.
- STEP 3
Drop 12 large spoonfuls of the mixture onto the prepared baking sheets, spacing them well apart.
- STEP 4
Bake in the oven for 15-20 mins, or until set and golden brown. Leave to cool on the baking sheets for 2-3 mins, then transfer the cookies to a wire rack and leave to cool completely