Add the sugar, water and rose blossoms to a small pot. Heat over medium heat until the mixture starts to simmer. Turn the heat down to low and simmer for about 10 mins until the mixture starts to thicken and it can coat the back of a spoon.
Let the mixture sit for a while and cool down on its own. When its cool, strain the simple syrup and discard the rose blossoms. Store the rose simple syrup in a container in the fridge until you are ready to use it.