On the Recipes > Settings > Favorite Recipes page you can enable the Favorite Recipe button, which allows your logged in users to set their favorite recipes. It will show up as a heart by default (the icon can be changed in the Template Editor):
This allows your users to click on it to indicate that recipe as a favorite recipe:
You can then add the [ultimate-recipe-favorites] shortcode to wherever you want a list of the logged in user’s favorite recipes to appear:
The Favorite Recipe button can be added to any template and works in the Recipe Grid as well: