Hamantaschen - chinese grandma

Ingredients

• 2 sticks butter, softened at room temperature, or shortening/margarine for pareve
• 1 1/4 cups sugar
• 2 eggs
• 1/4 cup orange juice or milk
• 1 1/2 teaspoons vanilla extract
• 1/4 teaspoon salt
• 2 1/2 teaspoons baking powder
• About 4 1/2 cups unbleached flour, plus more for rolling dough
• 1 egg, beaten (for egg wash)