Combine tequila, lime juice, orange juice, triple sec, honey and 1 ½ cups blackberries in a blender or food processor and process until smooth. Strain mixture over a pitcher to discard the solids.
Cut a lime and rub edges of glasses with it. Then dip the glasses in a plate that has either sugar or salt or a combination.
Serve margarita in glass over ice and garnish with lime and remaining blackberries.
Notes
If you don’t have fresh blackberries, frozen blackberries will work fine.
Use honey instead of simple syrup. It may not be traditional but takes less work and adds additional flavor.
Use silver tequila when making the margarita. Gold tequila can muddy the flavor.
Used crushed ice which will make the margarita colder quicker.