Blueberry cookiers

STEP 1

Heat oven to 190C/170C fan/gas 5. Line 2 baking trays with baking parchment. Tip the butter, sugars and vanilla into a bowl. Beat with a hand-held electric whisk until pale and fluffy. Add the egg and beat again. Tip the flour, bicarb and a pinch of salt into the bowl, and use a spatula to mix together. Add the blueberries, pretzel pieces and chocolate chunks, and mix again until everything is combined.
STEP 2

Scoop golf-ball-sized mounds of cookie dough onto the baking trays, making sure you leave plenty of space between each one. (You should fit 4-6 cookies on each tray, so you’ll have to bake in batches to make the total 20 cookies.) Can be frozen at this point – simply defrost in the fridge before baking. Bake for 18 mins, swapping the trays around halfway through.
STEP 3

Remove the trays from the oven and leave to cool for 10 mins before transferring to a wire rack, then bake the second batch. Continue until all the cookies are baked. Will keep in a cookie jar for up to 1 week.