Everything Cookies

Or, as my husband calls them, Monster Cookies.

Ingredients
1 cup butter
1 egg
1 tsp vanilla
2 tsp white vinegar
1/2 cup granulated sugar
1/2 cup brown sugar, tightly packed
1/2 cup peanut butter
1/2 cup Nutella
2 1/4 cups AP flour
3/4 cup quick oats
1/4 cup dark chocolate cocoa powder
1/2 tsp ground cinnamon
1/2 tsp baking soda
1/2 tsp salt
1/2 cup chopped walnuts
1/2 cup mini-semi-sweet chocolate chips
1/2 cup dark chocolate M&Ms
1 tbsp AP flour

Directions
1. Preheat oven to 350* F.
2. Mix butter, egg, vanilla, vinegar, granulated sugar, brown sugar, peanut butter, and Nutella. I use an electric or standing mixer for this.
3. In a separate bowl, mix together flour, oats, cocoa powder, cinnamon, baking soda, and salt. About 1/2 cup at a time, add dry mixture to wet mixture, stirring to combine with each addition.
4. Toss walnuts, chocolate chips, and M&Ms together with 1 tbsp AP flour.
5. Mix walnuts and chocolate into cookie dough. It may be easier to do this with a spoon, rather than with the mixer.
6. Put cookie mixture into the fridge for 15-20 minutes. Once it is chilled, scoop out spoonfuls onto cookie sheets lined with parchment paper. You can do this with two teaspoons or by rolling the dough into balls by hand. The balls of dough should be about 1 inch in diameter.
7. Bake for approximately 10 minutes at 350* F. The cookies don't spread out much at all, so you can put them closer together to bake (about a 1/2 inch apart). They won't spread out and it is hard to tell if they've browned as they bake, but they will start to crack on top.
8. Let cool on a wire cooling wrack. Store in an airtight container.