In a large and tall saucepan, combine the remaining ½ cup of water, maple syrup, honey and salt. Bring the mixture to a boil over medium-high heat. Make sure you keep a close eye on it, as it tends to foam up pretty quickly. (This is why using a very tall saucepan
is helpful!) Place a candy thermometer
into the saucepan and continue boiling until the temperature reaches 240°F (114°C). This will usually take around 12-14 minutes after it first boils.