01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - Combine ground flaxseed and warm water in a small bowl. Stir and let thicken for 5 minutes.
03 - Whisk together flour, baking soda, baking powder, salt, cinnamon, and nutmeg in a large bowl.
04 - In a separate bowl, mix melted coconut oil or vegan butter, sugar, plant-based milk, vanilla extract, and flax egg until smooth.
05 - Add wet ingredients to dry ingredients and stir just until combined without overmixing.
06 - Gently fold in vegan white chocolate chips and chopped pecans if using.
07 - Scoop tablespoon-sized portions of dough onto prepared sheets, spacing cookies about 2 inches apart.
08 - Bake for 11 to 13 minutes until edges are set and centers remain slightly soft.
09 - Let cookies cool on baking sheets for 5 minutes, then transfer to wire rack to cool completely.