Combine the sugar
and water in a small saucepan
until the sugar dissolves. Remove from the heat and add the mint leaves. Allow to steep
until cooled. Once cooled, strain
out the leaves.
Combine half of the mint syrup, 4 cups ice, and 1 cup bourbon
in a blender
. Blend until smooth. Pour into a pitcher. Repeat with the remaining ingredients. Rub the rims of julep
cups, if available, or wide-mouthed, long-stemmed glasses with orange
slices and dip the rims in sugar, then fill with the frozen mint juleps. Garnish each with an orange slice and mint
sprig and serve immediately.