Shake hard to blend the spices. Ground cinnamon and nutmeg don’t dissolve, so a vigorous 15-second shake spreads them evenly through the cider instead of leaving clumps on top. Never shake the ginger beer; add it at the end to keep its bubbles.
Pick the right cider. Fresh, unfiltered apple cider from the produce section gives the most apple flavor. Clear apple juice works if that’s all you have, but it’s sweeter and thinner, so cut the syrup back to ¼ ounce.
Taste your ginger beer first. Brands range from mild and sweet to fiery and sharp. If yours is very spicy, start with 3 ounces; if it’s sweeter, add a little extra lemon juice to keep the drink balanced.
Make it a mocktail. Skip the vodka and add an extra ounce of apple cider and a little more ginger beer. The spiced syrup and fresh lemon keep it tasting like a real cocktail.
Try a bourbon or spiced rum swap. Bourbon turns this into a Kentucky-style mule with caramel and vanilla notes, while spiced rum leans into the cinnamon and nutmeg. Both are great on a chilly evening.
Use the leftover simple syrup in other ways. A single batch of spiced cinnamon syrup makes enough for about two dozen cocktails, and it’s just as good stirred into coffee, tea, or lemonade.