Sylvia Almario Ibazeta's Brazo de Mercedes Recipe

Make the filling: Combine ingredients in a bowl and cook on a double boiler until thick. Set aside.

Make the meringue: Preheat oven to 400ºF.

Using an electric mixer, beat egg whites and cream of tartar until soft peaks form. Slowly add the sugar and vanilla. Continue to beat until stiff. 

Spread meringue on an oiled baking sheet lined with parchment paper. Bake until lightly brown.

Invert on parchment paper that has been sprinkled with sugar. Spread filling while meringue is still warm. Roll the meringue like a jelly roll.