Preheat oven to 350 degrees and line cookie sheet with parchment paper. Reduce the oven temperature to 325 if using a dark colored baking sheet.
In a large bowl, combine 1 cup peanut butter, 1 egg, 1 tsp vanilla, ½ cup brown sugar, ½ cup oats and ½ tsp baking powder with a hand mixer.
Add in ¾ cup chocolate chips, ½ cup chopped pecans, ½ cup broken pretzels, ¼ cup coconut and mix until well combined.
Using a ¼ cup dry measuring cup or a ¼ cup ice cream scoop to scoop the cookies onto the baking sheet. Flatten each cookie with a spoon.
Bake for 12 - 15 minutes.