Next Video: How to Make Caramel Apple Pie Video Cancel View Recipe: Sweet Potato Slab Pie with Marshmallow Whipped Topping This feature is not available with your current cookie settings. You can update your privacy settings to enable this content. Please enable all cookies to use this feature. How to Make Sweet Potato Slab Pie with Marshmallow Whipped Topping Video View Recipe: Sweet Potato Slab Pie with Marshmallow Whipped Topping Even if you love pumpkin, you have to try this Sweet Potato Slab Pie. A flaky Pillsbury™ pie crust is topped with a flavorful sweet potato filling, but the best part is the sweet and creamy marshmallow topping—yum! Fall Baking Recipes By Pillsbury