Muddle the mint leaves in the glass/pitcher until aromatic, then add in the peaches and sugar and muddle more.
Fill the glass/pitcher with crushed ice (If using glass, fill to brim. If using pitcher, fill about 1/2 way), then pour the bourbon and lemon juice over. Stir.
Notes
*I love rye bourbon, but if it isn’t your thing, feel free to use your favorite regular bourbon!