Identify how the Luxardo is used: cocktails (need aroma and a balanced sweetness) vs baking (need cherry/almond notes more than proof).
Pick the closest match from the list and apply the ratio (start slightly low for non-alcohol swaps to avoid overt sweetness).
For syrup-based swaps, account for extra sugar: reduce any added sugar in the recipe by 10–25% if the batter tastes sweet.
For almond-based swaps, steep/whisk the flavor into the liquid base first so it disperses evenly before mixing into batter.
Taste and fine-tune at the end: add a few drops of cherry juice for fruit brightness or a pinch of salt to sharpen cherry notes.