Vanilla Pudding Sauce (for pancakes)

Ingredients:
2 tbsp. cornstarch
1/3 c. sugar
1/8 tsp. salt
2 c. milk
2 egg yolks, beaten
1 tbsp. butter
2 tsp. vanilla

Directions:
Mix cornstarch, sugar, and salt in a saucepan. Whisk together milk and egg thoroughly, and gradually stir in. Cook over medium heat stirring constantly, till mixture comes to a boil. (DO NOT turn up the heat; if it gets hot too fast, you end up with scrambled eggs in vanilla sauce.) Boil for at least 1 minute, still stirring constantly. Remove from heat and stir in butter and vanilla. Serve warm or chilled over pancakes.