Equal parts honey and hot water make a syrup that dissolves easily in cold drinks: stir one part honey into one part hot water until the honey is fully liquid, then cool the mixture and store it in the refrigerator. The hot water breaks the honey's thickness so it can blend into iced tea, lemonade, cold coffee, or a shaken drink without pooling at the bottom of the glass. A one-to-one syrup by volume is the standard; a two-to-one syrup gives more honey flavor with less added water.

I keep a pint jar of it on the door of my fridge, next to the mustard. The first time I tried to sweeten a glass of iced tea with honey straight from the jar, I watched a rope of honey sink and sit on the bottom like a stone. The tea stayed bitter on top. I stirred until my wrist ached; the honey just coiled around the spoon and refused to mix. That was the day I started making syrup.
Now when I make it, I stand at the counter with a liquid measuring cup, a jar of honey, and a kettle that has just clicked off. I pour the honey first, one cup, then hot water to the same line. The honey slumps into the water. I stir with a fork, slowly, watching the threads dissolve. Steam curls up. The smell of the honey blooms, then fades as it cools. That fade is the point: heat coaxes the honey into water, but too much heat drives off the floral notes.
The Ratio That Pours
One-to-one by volume is my default. It pours and measures like rich simple syrup, so I can swap it into a drink without rethinking the sweetener. If I want more honey flavor, I make a two-to-one syrup: two parts honey to one part hot water. It is thicker, so it does not pour as fast, but it adds less water to the drink. In a cold drink, that matters. A 1:1 syrup dilutes the drink a little; a 2:1 syrup dilutes less and tastes more of honey. The tradeoff is that 2:1 is harder to measure cold and can crystallize in the fridge. I often keep both: 1:1 for everyday, 2:1 for when I want the honey to lead.
Here is the part that trips people up. Equal parts by volume is not equal parts by weight. Honey is heavier than water. One cup of honey weighs about 12 ounces (340 grams), while one cup of water weighs about 8 ounces (237 grams). So if I use a scale and mix equal weights, I am actually using more water by volume than honey, which gives a thinner syrup than the classic bar ratio. To match 1:1 by volume on a scale, I use about 1.4 parts honey to 1 part water by weight. For a 2:1 by volume syrup, that is closer to 2.8 parts honey to 1 part water by weight. I usually just use volume for syrup because that is what most recipes mean, but if I am scaling up for a party, the scale is more reliable and I adjust.
Crystallized Honey Has to Be Warmed First
If the honey in the jar has gone grainy, I do not scoop it into hot water and hope. I set the jar in a bowl of warm tap water, not boiling, and wait. The crystals loosen from the bottom up. I check with a spoon. Once it is liquid, I measure. If I skip that step, the crystals never fully dissolve in the syrup, and they settle out in the cold drink as grit. The warm water bath is gentle; it does not cook the honey or mute its aroma the way a direct boil would.
Heat, Aroma, and the Cold Drink
Honey's aroma compounds are volatile. A rolling boil for ten minutes blows off the floral notes that make a wildflower honey taste different from a clover honey. I heat the water only until it steams, then take it off the heat and stir the honey in. The syrup cools to room temperature, then goes into the fridge. When I add it to a cold drink, the aroma is still there. If I add it to a very hot drink, the aroma mutes. That is why I use this syrup for cold drinks: the honey's scent survives the chill, and the drink stays bright.
What Honey Syrup Does in the Glass
Honey adds body and a slight viscosity to shaken and stirred drinks that plain syrup does not. In a shaker, a 1:1 honey syrup makes a drink feel rounder; the texture coats the tongue a little more than simple syrup. In a stirred drink, it adds weight without making the drink feel heavy. Simple syrup adds sweetness and nothing else. Honey syrup adds sweetness and a soft, almost silky edge. That is the reason I keep it around even when I have a bottle of simple syrup in the fridge.
I let the syrup cool on the counter before I cap it. If I add it hot to a glass of iced tea, it melts the ice and waters down the drink. Cold syrup blends in without thinning the drink as much. I date the lid and trust my nose; if it smells off, I toss it. A jar of 1:1 honey syrup usually lasts me a few weeks in the refrigerator, and the 2:1 jar lasts longer because it has less water. But I do not push it. The point is to have it ready when I want a cold drink that tastes like honey, not just sugar.