Granny’s Cocoa Cream Pie

Today’s recipe is a quick, creamy and wonderful summer dessert , my mom used to make it when we were younger , with the flavor of chocolate it was a MIRACLE!!!!
DETAILS :

Servings 6
  Preparation time 15 mins
    Cooking Time 120 mins
INGREDIENTS :

    3 large egg yolks.
    2 cups whole milk.
    1 cup and half granulated sugar.
    1 cup cocoa powder.
    ¼ cup cornstarch.
    1 tsp pure vanilla extract.
    1 cup white flour.