Preheat the oven to 350 degrees. Place about 3 tbs. of blackberries into the bottom of each jelly jar.
You will want to fill the jar about ½ way.
Combine the rolled oats, flour, brown sugar. Using a fork, or a pastry cutter, cut in your 4 tbs. of butter or margarine until crumbly.
Scoop 2-3 tbs. of crumble into your jelly jars on top of the fresh blackberries. You want the crumble to come up to the top of the jar.
Bake for 25 minutes. Crust will turn golden brown.