Step 1

Over medium heat, stirring frequently, bring the sugar, butter, cocoa, and milk to a low rolling boil.

Step 2

Reduce the heat to low and let the mixture boil at a low rolling boil for three minutes.

Step 3

Remove from heat and add the peanut butter, vanilla, and oats.

Step 4

Scoop tablespoonfuls onto a sheet of waxed paper using a couple of spoons or your favorite cookie scoop. Feel free to flatten them a bit by pressing with your fingers or the bottom of a measuring cup if you prefer.

Step 5

Let cool at room temperature. They should harden within about an hour. Cookies keep covered at room temperature for several days.