Preheat the oven to 350 degrees and line baking sheets with parchment paper.
In a small bowl, use a fork to mix together the very warm milk and ground flaxseed. Set aside for it to thicken.
In a medium bowl, cream together the butter and brown sugar for 1 minute.
Add in the flax mixture, salt, vanilla extract and mix again.
Add in the baking soda, oats and flour. Mix until the flour is completely incorporated.
Stir in by hand the peppermint chunks and white chocolate.
Use an ice cream style scooper to create even sized cookie dough balls on the trays. Press any stray edges of cookie dough back around the cookie ball so it makes a nice circle.
Press a few extra white chocolate pieces on top of the cookie dough ball so the top of the cookie looks pretty.
Bake for 10 minutes or until the edges are set.
Let the cookies cool on the tray for at least 10 minutes to firm up (they will fall apart if you try to pick them up right away).
Move the cookies to a wire rack to cool the rest of the way.
Store in an airtight container. These cookies freeze well!
Notes
Coconut oil isn’t the best fit for a dairy free substitute, so go with a diary free butter alternative if needed.I used cows milk, but any milk should work well. The key for making the egg replacement is having the milk be quite warm, mixing the flax meal in well and then letting it sit to thicken for a few minutes.The calories shown are based on the recipe making 18 cookies, with 1 serving being 1 cookie. Since different brands of ingredients have different nutritional information, the calories shown are just an estimate. **We are not dietitians and recommend you seek a nutritionist for exact nutritional information.**