Preheat the oven to 350 degrees Fahrenheit with two racks in the middle. Line two baking sheets with parchment paper (if you don't have parchment paper, lightly grease the baking sheets). Pour the peanut butter into a mixing bowl. Add the melted butter and whisk until the mixture is well blended. Use your whisk to beat in the egg, scraping down the side of the bowl once it's incorporated, then whisk in the vanilla, baking soda, baking powder and salt. Switch to a big spoon and stir in the ground oats, rolled oats and chocolate chips until they are evenly combined. Drop the dough by the tablespoon onto your prepared baking sheets. Bake the cookies, reversing the pans midway through (swap the cookies on the top rack with the cookies on the lower rack) until they're barely set and just beginning to turn golden around the edges, about 12 minutes. Remove the cookies from the oven and let them cool completely on the pans.