Decide whether you need alcohol (for cocktails) or a non-alcohol substitute (for kid-friendly drinks/desserts).
Pick the substitute that matches flavor first: coffee-forward, then caramel-like sweetness, then alcohol presence.
Use the listed ratio (1:1 when the product is already coffee-liqueur sweet; adjust when using coffee-only swaps).
Taste after mixing: add a little sugar/syrup for sweetness or add more coffee for stronger roast flavor.
If the swap is coffee-based, let it sit 2–3 minutes so the flavors blend before serving.