Whistle Stop Recipes Apple Crisp Batter is the finest on the market and, as in all WhistleStop products, quality is the main ingredient. We developed a perfect blend of spice, flour and the highest quality blended sugars to give our Apple Crisp its delicious and distinctive flavor. WhistleStop Apple Crisp is great with your favorite apples and is also great with pears, peaches, berries, and even pineapple.