No Bake Cookies

2 cups sugar
1/2 cup milk
1/2 cup butter
1/3 cup cocoa

Combine all ingredients above. Bring to a boil over medium heat. Stir often. Bring to a rolling boil for 2 minutes. take off heat.
Add the following ingredients to above mixture. 
1/2 cup peanut butter
2 tsp vanilla
3-4 cups rice krispies

Drop mixture on wax paper and let sit to cool.  Smoosh down to cookie shape once cool.
**recipe from my grandmother. my mom makes these all the time to give to neighbors for a special treat.