This simple raspberry syrup recipe has a five-star rating on Allrecipes.com as of 2015. It creates a thinner syrup ideal for use in flavored beverages. This recipe yields about 15 servings and averages roughly 38 calories per serving. It takes around one hour and 15 minutes from beginning to end, including preparation, and requires a small saucepan, potato masher or fork, spatula, fine mesh strainer, and sealable container.
Start by combining 2/3 cup of water and 2/3 cup of sugar in a saucepan. Bring the water to a boil, stirring the mixture occasionally until the sugar is completely dissolved. This should take between five and 10 minutes. Once the sugar is dissolved, remove the saucepan from its heat source and stir in 1 cup of fresh raspberries. Use the potato masher or a fork to mash the mixture together, breaking down the raspberries into a pulp. Then, allow this to steep for an hour or more. It can remain in the saucepan to steep.
After the mixture has steeped, drain it through a fine mesh strainer. Use a spatula to squeeze the pulp against the strainer, releasing as much juice as possible. Place the strained liquid in a sealed container, and store it in the fridge to thicken. For frozen, rather than fresh, raspberries, stir them in before taking the saucepan off its heat source.