Step 1

Preheat oven to 350F/180C. Line two baking sheets with parchment paper. Make the flax egg by combining the ground flax and water in a small bowl. Set aside.

Step 2

Cream together the vegan butter, brown sugar and white sugar with a hand mixer on medium speed until combined.

Step 3

Add the flax egg and vanilla and mix together on medium speed until smooth.

Step 4

Bit-by-it, add the all-purpose flour and mix to combine, add the cornstarch, baking soda and salt, mix again on medium speed to combine.

Step 5

Fold in the chocolate chunks and chocolate chips. Scoop two tablespoons of the dough and roll into a ball. Place on the baking sheet. Continue until you've used all the dough. Bake the cookies until lightly golden brown on the top, 8-10 minutes. Let cool for 5 minutes, transfer to a cooling rack.