Show me cocktails with Ballantine's and agave syrup.

It looks like there is only one cocktail in the provided list that includes agave syrup as an ingredient, and while it doesn't specifically mention Ballantine’s, it does use tequila, which might appeal to your interest in agave syrup. The cocktail is the Añejo Old Fashioned.

The Añejo Old Fashioned is a sophisticated twist on the classic Old Fashioned cocktail, using añejo tequila as its foundation instead of whisky. This modern variant offers bold flavors with smooth, rich notes from the aged tequila, a bit of subtle sweetness from agave syrup, and a unique zest from Margarita Bitters. It’s not shaken or stirred, just carefully crafted, making it an elegant option for those who want to enjoy the complex flavors of a well-made drink.

While this cocktail primarily features tequila, the use of agave syrup is what sets it apart and provides a familiar sweetness that compliments the deep, robust character of the aged tequila. It’s a beautiful choice if you appreciate nuanced, refined drinks and are looking to explore something slightly different while still enjoying the unique taste and sweetness that agave syrup brings to the table.