Hope this recipe will help you. I never tried it though.
3/4 cup sugar
1/2 cup butter, melted
2 teaspoons vanilla
1 1/2 cups flour
2 teaspoons baking powder
Beat the eggs and gradually beat in the sugar until the mixture is creamy. Stir in the melted butter and vanilla. Combine the flour and baking powder, and then add it to the mixture. Blend it in well.
Drop about 4 teaspoons of the batter into a heated pizelle iron, and cook both sides over medium-high heat for about 1 minute each, or until golden brown. Remove the waffle from the pizelle iron and immediately shape it into a cone while it is still pliable.
When you form the cones, there will probably be a small hole in the bottom of them that ice-cream can drip out of. One idea for plugging this hole is to put miniature marshmallows in the bottoms of the cones.