Preheat your oven to 375˚F.
Mix flax meal and water, allowing it to thicken for 15 minutes.
Melt vegan butter (preferably in a saucepan on low heat to avoid microwave mess).
Add melted butter to a stand mixer with both sugars, beating on medium speed for 2-3 minutes.
In a separate bowl, whisk together flour, baking soda, and salt.
Add flax "egg" and vanilla to the butter mixture and mix until combined.
Incorporate the dry mixture into the wet ingredients in batches. Fold in chocolate chips and granola.
Using a large cookie dough scoop (2-3 tablespoons), arrange dough on a parchment-lined baking sheet, leaving some space between each.
Gently press down on each cookie with the flat bottom of a measuring cup (they won't flatten as much as regular cookies due to the granola).
Bake for 10-12 minutes, then let cool for 5 minutes before transferring to a cooling rack.