Make your flax egg by mixing together flax and water. Let sit refrigerated for 5-10 minutes.
Preheat oven to 350 degrees.
Mix together your wet ingredients including flax egg until smooth.
Pour in dry ingredients except for apples. Mix again until smooth.
Lastly fold in apples.
Form 9-10 evenly sized cookies on a sheet pan lined with parchment paper. The dough is very sticky, so work quickly and with wet hands.
Bake cookies for 12-15 minutes until they are golden on the edges and cooked through.
Cookies will come out a little lumpy so I reshaped mine into perfect circles with a cookie cutter, this step is optional. Let cookies cool for at least 10 minutes and dig in.