Instant fudge

Enjoy this recipe for instant fudge!
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Instant Fudge
1 1/2 cups sugar
2 tablespoons butter
1/2 cup evaporated milk
2 cups semi-sweet chocolate chips
1/2 teaspoon vanilla
In saucepan, combine sugar, butter and evaporated milk. Boil over medium heat for 5 minutes, stirring constantly. Remove from heat. Add chocolate chips, stirring until melted. Add vanilla, stir. Pour into greased 8-inch square pan. Chill for 2 hours.