Place fruit, spices, honey, apple cider and cranberry juice into a large slow cooker.
You may need to use two slow cookers to get everything to fit - if so, evenly split all of the ingredients between the two slow cookers.
Cook on high for four hours or until fruit is broken down.
Strain fruit and mulling spices from the mixture.
Cool to room temperature.
Add whiskey and grain alcohol once mixture is completely cooled.
Transfer Boilo to mason jars with tight fitting lids and store in a cool, dry place.
Boilo can be served warm or cold, depending on your preference.
Notes
Make Milder: Try adding ginger ale or fruit juice like orange juice to the drink.
Garnish: Garnish with candied fruit peels, fruit slices or spices.
Variation tip: Feel free to add as many tips as you need in this section
Alternate ingredient: Caraway seeds or allspice berries can add a nice flavor.
Alternate cooking method tip: Boil the fruit mash on the stove top in a large stock pot and reduce to a slow simmer. Then squeeze out the fruit and stir in the alcohol to the liquid per the recipe card instructions below.