Preheat oven to 425°F.
In a large bowl combine 1 cup of the all-purpose flour, 1 envelope Fleischmann's® RapidRise Yeast (undissolved), 1/4 cup sugar and 3/4 teaspoon salt.
Add 2/3 cup very warm water (120° to 130°F), 3/4 teaspoon vanilla extract and 3 tablespoons melted butter or margarine; mix until well blended, about 1 minute.
Gradually add enough of the remaining flour (up to the total 1-3/4 to 2-1/4 cups called for) to make a soft dough that forms a ball and is slightly sticky.
Turn the dough out onto a lightly floured surface and knead until smooth and elastic, about 4 minutes, adding small amounts of flour only if necessary.
Just prior to finishing kneading, work in 1/2 cup miniature chocolate chips so they are evenly distributed.
Place the dough in a bowl, cover loosely, and allow it to rest for 10 minutes.
Divide the dough into 6 equal portions and shape each portion into a ball.
With floured hands or a floured rolling surface, pat or roll each ball into a 6-inch circle.
Place the 6-inch rounds on greased baking sheets (three per sheet).
Bake 11–15 minutes or until the crusts are golden brown.
Remove crusts from the oven and allow them to cool.
Serve cooled crusts with an assortment of sauces and toppings and let guests top their dessert pizzas as desired.