Add 2 oz silver tequila, 1 oz huckleberry liqueur (or 1 oz huckleberry syrup + 0.25 oz light liqueur), 0.75 oz fresh lime juice, 0.5 oz simple syrup (omit or reduce if using sweet huckleberry syrup), and 2 dashes Angostura bitters into a cocktail shaker.

Shake

Fill the shaker with ice and shake vigorously for 10–15 seconds until well chilled.

Strain & Top

Double-strain into a Boston (large) Collins or highball glass filled with fresh ice. Top with 3 oz tequila seltzer (or fizzy sparkling water) and gently stir once to combine.

Finish

Add 2nd dash of bitters on the surface (optional) to add aromatic complexity and a faint bitters swirl.

Garnish

Thread 3–4 fresh huckleberries or blueberries onto a cocktail pick and lay across the glass. Add a lime wheel on the rim and a mint sprig tucked beside it. Serve immediately with a straw.