Combine 1 cup granulated sugar and 1 cup water in a small saucepan. Add 2 tablespoons dried culinary lavender and 1 teaspoon fresh lemon zest. Heat over medium, stirring occasionally, until sugar fully dissolves and mixture just reaches a gentle simmer (about 4–5 minutes). Do not boil vigorously — gentle simmer is sufficient to extract flavor without bitterness.

Once sugar is dissolved and fragrant (about 5 minutes), remove the pan from heat. Let the lavender steep in the hot syrup for 15 minutes to deepen aroma and flavor.

Strain the syrup through a fine mesh sieve or cheesecloth into a heatproof container, pressing on the solids to extract liquid. Discard solids. Cool syrup to room temperature, then refrigerate until cold (at least 30 minutes). Yields about 1 cup of syrup.

Lemonade Base

Juice lemons

While the syrup cools, juice fresh lemons to measure 1 cup of lemon juice (approximately 4–6 medium lemons). Strain seeds and excess pulp if desired for a smoother beverage.

In a 1.5–2 quart pitcher, combine the 1 cup fresh lemon juice, 3 cups cold water, and the cooled lavender simple syrup. Start by adding 3/4 to 1 cup of syrup, taste, and adjust depending on desired sweetness and lavender intensity. Stir to combine.

Add 1 teaspoon fine sea salt to the lemonade mixture and stir until dissolved — the salt brightens flavors and balances sweetness.

Chill and finish

Add 4 cups of ice to the pitcher or to individual serving glasses. Pour the lemonade base over the ice, leaving room to top with sparkling water. Stir gently to chill.

Just before serving, gently pour 2 cups chilled sparkling water into the pitcher (or top each glass individually) to preserve effervescence. Stir once lightly to incorporate.

Seasoning & Garnish

Taste the finished lemonade and adjust: add up to 2 tablespoons extra syrup if you prefer sweeter, or a pinch more salt (up to 1/4 teaspoon) if brightness needs it. Be conservative — salt should be subtle.

Pour into glasses over additional ice if desired. Garnish each glass with a lemon slice and a sprig of lavender. For a frosted rim effect (optional), wet the rim with a lemon wedge and dip in superfine sugar before pouring.

Serve immediately to enjoy the sparkling fizz. Store leftover lemonade (without sparkling water) in the refrigerator for up to 48 hours; add sparkling water just before serving.