What Is a John Collins?

The John Collins is a tall, refreshing cocktail from the Collins family — a group of drinks built on a simple formula: spirit, citrus, sweetener, and carbonated water. The drink's closest relative is the Tom Collins, which uses gin. When bartenders substituted whiskey for gin, the result became the John Collins.

The drink dates to the mid-1800s. Early American versions used rye whiskey, which was the dominant spirit before Prohibition. Today, both bourbon and rye are widely used. The final result is bright, citrusy, slightly sweet, and effervescent — a drink that works equally well at a summer backyard gathering or a quiet evening at home.

Unlike more elaborate cocktails, the John Collins requires no special technique and only four ingredients. Once you understand the ratio, you can make one in under five minutes with equipment you likely already own. The base proportion is straightforward: 2 parts spirit : 1 part lemon juice : 0.75 parts simple syrup, topped with soda.

Ingredients for a Classic John Collins

To make one John Collins, you need the following ingredients:

• 2 oz (60 ml) bourbon or rye whiskey — a 100-proof bourbon like Wild Turkey 101 or a rye like Rittenhouse Rye 100 both work excellently; avoid your most expensive bottle, as lemon and soda mute subtle barrel notes
• 1 oz (30 ml) fresh lemon juice — from about half a medium lemon, pressed just before mixing
• 0.75 oz (22 ml) simple syrup — equal parts sugar and water, dissolved; see the section below for how to make it
• 3 oz (90 ml) cold club soda — plain club soda only; tonic water adds bitterness, and flavored sparkling water muddies the flavor
• Ice — large cubes for both shaking and serving

For optional garnish, add a lemon wheel placed on the rim of the glass and a maraschino cherry on a cocktail pick. These are aesthetic choices — they signal a finished presentation but do not meaningfully change the flavor of the drink itself.

Equipment You Will Need

You do not need a full bar setup. These are the essentials for making a John Collins at home:

• Cocktail shaker — a Boston shaker (two-piece metal tin) or a cobbler shaker (three-piece with built-in strainer) both work; the Boston shaker is preferred by bartenders for its efficiency
• Jigger — a double-sided measuring tool, typically 1 oz on one side and 0.5 oz on the other; many have inner markings for 0.75 oz
• Hawthorne strainer — needed if you use a Boston shaker; not required with a cobbler shaker, which has a built-in strainer cap
• Citrus juicer — a handheld squeeze juicer or a countertop reamer; press the lemon fresh immediately before mixing for best results
• Collins or highball glass — 12 to 14 oz capacity
• Bar spoon — for the gentle final stir after adding the soda

If you do not have a shaker, you can build this drink directly in the glass over ice and stir with a long spoon. The shaken version is slightly better integrated and colder, but the stirred build is a fine alternative if you are just starting out.

Step-by-Step: How to Mix a John Collins

1. Juice the lemon. Cut a medium lemon in half and press it into your juicer. Measure out exactly 1 oz (30 ml) of juice. Remove any seeds that fell in. Fresh juice should be used within 15 minutes for the best flavor — oxidation dulls the brightness quickly.
2. Fill your shaker with ice. Add a generous cup of ice cubes to your cocktail shaker. You want enough ice to chill the liquid rapidly without the shaker feeling less than half full.
3. Measure and add the spirits and mixers. Pour 2 oz bourbon or rye whiskey, 1 oz fresh lemon juice, and 0.75 oz simple syrup into the shaker over the ice. Do this in any order — it does not affect the outcome.
4. Shake hard for 10 seconds. Cap the shaker tightly and shake vigorously. Ten seconds is sufficient to chill the drink and achieve a light dilution. Shaking longer over-dilutes and makes the drink watery before you finish it.
5. Fill your serving glass with fresh ice. Add large ice cubes to your Collins or highball glass. Using fresh ice — not the shaker ice — prevents watery dilution in the glass, since the shaker ice is already partially melted.
6. Strain into the glass. Hold your strainer over the glass and pour the shaken mixture over the fresh ice. Leave about an inch of space at the top for the soda.
7. Add cold club soda down the side. Hold the glass at a slight angle and pour 3 oz of cold club soda gently down the inside wall of the glass. This preserves carbonation far better than pouring directly from above into the center of the drink.
8. Stir once, slowly. Insert a bar spoon and give a single slow stir from the bottom of the glass to the top. This integrates the soda with the base without deflating the carbonation.
9. Garnish and serve immediately. Place a lemon wheel on the rim and a cherry on a pick if desired. Serve right away — the drink is best in the first 5 to 10 minutes before the ice dilutes it further.

How to Make Simple Syrup from Scratch

Simple syrup is the easiest bar ingredient to make at home and it keeps for weeks in the refrigerator. Here is the standard 1:1 recipe:

1. Measure 1 cup of granulated white sugar and 1 cup of cold water.
2. Combine both in a small saucepan over medium heat.
3. Stir continuously as the mixture heats. The sugar will dissolve fully within 2 minutes and the liquid will turn clear.
4. As soon as the liquid is clear and no sugar grains remain, remove the pan from heat. Do not let it come to a full boil — boiling drives off too much water and changes the ratio.
5. Allow the syrup to cool to room temperature, then pour into a clean glass jar with a tight lid.
6. Store in the refrigerator. A 1:1 simple syrup keeps for 2 to 3 weeks.

For rich simple syrup, use a 2:1 ratio — 2 cups sugar to 1 cup water. This produces a thicker, sweeter syrup. When substituting rich simple syrup in a cocktail recipe that calls for regular simple syrup, use roughly half the specified quantity. Rich syrup lasts slightly longer in the refrigerator — up to 4 weeks — because the higher sugar concentration inhibits bacterial growth.

You can also make flavored syrups by adding a flavor agent during the heating step. A sprig of fresh rosemary or thyme added to the pan and removed after cooling produces an herbed syrup that adds complexity to a Collins without overwhelming the whiskey. Two cinnamon sticks added during heating create a warm spiced syrup that pairs exceptionally well with a high-rye bourbon.

John Collins Variations Worth Trying

Once you are comfortable with the classic recipe, these variations are easy to make and each shifts the character of the drink in a distinct direction:

• Rye Collins — Substitute rye whiskey for bourbon. The rye's peppery, spicy notes cut through the lemon more assertively than bourbon does, producing a drier drink overall. Rittenhouse Rye 100 or Sazerac Rye are excellent choices.
• Honey Collins — Replace the simple syrup with honey syrup (equal parts raw honey and warm water, stirred until dissolved and cooled). The honey adds floral depth and works especially well with a high-proof wheated bourbon like Larceny Barrel Proof.
• Smoked Collins — Use a lightly peated blended Scotch whisky instead of bourbon. The smoke plays against the lemon's brightness in an unexpected but enjoyable way. Monkey Shoulder or Compass Box Great King Street Artist's Blend are accessible, affordable options.
• Cucumber Collins — Muddle three thin cucumber slices in the bottom of the shaker before adding ice and the other ingredients. The cucumber adds a cool, fresh vegetal note that makes this version especially refreshing on a hot day.
• Sparkling Wine Collins — Replace the club soda with cold prosecco or a brut cava for a more festive, lower-volume variation. Reduce the whiskey to 1 oz in this version to keep the alcohol content balanced, since sparkling wine adds its own alcohol.

All of these follow the same base ratio: the spirit-to-lemon-to-syrup proportion holds across every variation. What changes is the spirit, the sweetener, or both. Once you internalize the structure, you can improvise with whatever is in your cabinet and produce a coherent, drinkable result every time.

Common Mistakes and How to Avoid Them

Even a simple drink has a few failure points. These are the most common errors when mixing a John Collins at home:

• Using bottled lemon juice. The flavor is flatter and more acidic than fresh juice. Preservatives add off-flavors that are obvious in a drink built around citrus. If you are out of lemons, fresh lime juice works better as a substitute than bottled lemon juice.
• Adding club soda to the shaker. Never shake carbonated liquid — it builds pressure in the shaker and will spray when you open it. Always add the soda to the glass after straining the shaken base.
• Over-shaking. Ten seconds is enough. Shaking for 20 or 30 seconds over-dilutes the drink and makes it watery before you reach the bottom of the glass. The goal is to chill, not to water down.
• Using thin, hollow ice cubes. Thin ice melts quickly and dilutes the drink before you finish it. Large, solid ice cubes — from silicone trays that make 2-inch cubes — melt slowly and keep the drink cold and properly concentrated longer.
• Skipping fresh ice in the serving glass. If you pour directly over the shaker ice, you end up with ice that is already warm and partially melted. Always use a fresh scoop for the glass.
• Not measuring. Eyeballing spirits is the fastest way to produce an unbalanced drink — either too strong, too sour, or too sweet. A jigger costs less than five dollars and guarantees consistent results every time you mix.