2 tbsp sugar (NOTE: Having made many more margs since this one, I would actually recommend using simple syrup rather than straight sugar -- itll give you a more concentrated and even sweet flavor. Just bring 1 cup sugar and 1 cup water to a simmer over the stove, until sugar is completely dissolved. Then, measure out the amount of syrup youd like to use in your beverage. I suggest starting out with 1 oz, and tweaking it from there based on taste.)
1 tbsp lemon (or lime) juice
4 oz champagne (1 oz = 1 shot)
2 oz tequila
Directions
Throw 1 cup blackberries, lemon juice, and sugar (or simple syrup) into a martini shaker. Using a large spoon, crush berries and stir mixture until juicy.
Add tequila, cap the shaker, and shake until mixture is well-combined. (Dont be a dummy like me and shake after adding champagne. Champagne is fizzy, and shaking it will just cause you to have a messy, red explosion all over your counters. You could also just combine all the ingredients in a carafe and stir vigorously.)
Uncap shaker and pour mixture directly into 2 champagne glasses. Divide champagne between glasses, and stir gently. (You can strain the liquid out, or leave the fruit chunks. I personally think this drink tastes better with crushed pieces of fruit adding extra flavor.)