Peanut Butter Fudge

This was my first fudge and it was very easy and very yummy.  My kids loved it.
Here's the recipe:

2 cups sugar
1/2 cup milk
1 tsp. vanilla,
3/4 cup peanut butter.

Bring sugar and milk to a boil. Boil two and a half minutes. Keep stirring to prevent burning on the bottom. Remove from heat and stir in PB and vanilla. Pour into a 9x9 pan and let set.  I keep fudge in the fridge or freezer so it stays set properly.