Preheat the oven to 350-degrees and line your baking sheet with parchment paper.
In a small bowl, combine the butter and peanut butter.
Microwave about 1 minute until melted, and stir to combine.
Beat in the brown sugar.
In a medium bowl, beat and egg with the vanilla.
Stir the butter and peanut butter into the wet ingredients.
Now add all of the dry ingredients into the wet ingredients and mix well.
Fold in the chocolate chips.
I use a ½-inch cookie scoop ((You can also use a tablespoon if you don't have one) and roll small balls of dough, then gently flatten with the palm of your hand.
Bake 8-10 minutes until the edges are golden brown.
Let set 2 minutes before removing to a cooling rack.
Notes
VARIATIONS
Instead of flaxseed, you could use wheat germ or sweetened flaked coconut.
If your family enjoys nuts, use ¼-½ cup of chopped walnuts, almonds, or pecans.
Use only a ½ cup of semi-sweet chocolate chips and substitute dark chocolate, white chocolate, or even butterscotch chips for the other half.
STORAGE
Cookies will last 5-7 days in an airtight container at room temperature.
Bonus tip - the dough freezes great, so double the batch and throw half in the freezer for another day! Make sure you label your freezer bag.