Preheat oven to 350* F. Line two baking sheets with parchment paper.
In a large mixing bowl using a hand mixer, cream vegan butter and brown sugar until smooth and creamy. Then, add the peanut butter and mix to combine.
8 tablespoon Non-Dairy Butter, 1 Cup Light Brown Sugar, tightly packed, ½ Cup Natural Creamy Peanut Butter
Add non-dairy milk and vanilla and mix on low to combine.
¼ Cup Non-Dairy Milk, 1 teaspoon Vanilla Extract
Add King Arthur Measure for Measure Gluten-Free Flour, baking soda and salt and mix on low to form the cookie dough.
1 ¼ Cup King Arthur Measure for Measure Gluten-Free Flour, ½ teaspoon Baking Soda, ¼ teaspoon Kosher Salt
Use a 3 tablespoon cookie scoop to scoop about 8 cookie dough balls onto each baking sheet. Then, use a fork to gently press a cross-hatch patter into the top of the cookie dough. The dough balls should still be about 1 inch tall.
Top each cookie with a sprinkle of chopped peanuts, if using, then bake one tray at a time in a 350* F oven for 13-15 minutes. The cookies should be golden brown at the edges.
¼ Cup Roasted Unsalted Peanuts, chopped
Allow the cookies to cool on the baking sheets for 10 minutes before tranfering them to a wire cooling rack to cool completely.