Step by step process: 1. In a cocktail shaker, combine the tequila, vodka, lime juice, absinthe, simple syrup, and Angostura bitters. 2. Fill the shaker with ice cubes and shake vigorously for about 10-15 seconds to chill the mixture. 3. Strain the mixture into a tall glass filled with ice cubes. 4. Top the glass with club soda, leaving some space at the top for garnish. 5. Give it a gentle stir to mix the ingredients. 6. Garnish with a lime wedge and a sprig of mint (optional). 7. Serve and enjoy! Nutritional Information (approximate values per serving): - Calories: 180 - Carbohydrates: 10g - Sugar: 8g - Protein: 0g - Fat: 0g - Sodium: 10mg - Fiber: 0g Note: Nutritional information may vary depending on the specific brands of ingredients used.