1. Beat 2/3 cup butter and 1 ¾ cup sugar until light and fluffy, sift together 3 cups flour, 3 ½ tsp baking powder and ½ tsp salt, add alternately to cream mixture with 1 1/3 cup milk add 1 ½ tsp vanilla essence, stir in 1 cup chocolate chips, in another bowl beat 4 egg whites until stiff peak form, gently fold egg whites into cream mixture, pour in a greased and floured Bundt pan, bake on 180 degree C for 50 minutes, cool in pan for 10 minutes. Invert on a serving platter and cool completely. Top with vanilla glaze.
Method for vanilla glaze
2. In a small bowl combine 1 ½ cup sugar, 1 tbsp butter, 1 tbsp vanilla, add 2 tbsp milk gradually to achieve desired consistency, stir until smooth, drizzle on cooled cake.