Pascal’s Precision Sour

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

A classic whiskey sour enhanced with a dash of aromatic bitters and a smooth egg white foam for a silky texture. This cocktails-inspired cocktails & drinks ready in about 7 minutes brings together bourbon whiskey, fresh lemon juice, rich simple syrup (2:1) for a refreshing, crowd-pleasing drink — a bright, easy pour for parties, gatherings, or any warm-weather afternoon when you want something festive without alcohol-only options. Each serving lands at about 210 calories and feeds 1, so it works for entertaining, brunch, or a non-alcoholic option at the bar cart. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 7 min Serves 1 Cocktails cuisine 210 cal/serving
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Ingredients

Equipment for this recipe

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Instructions

  1. Step 1: Add 2 oz bourbon, 3/4 oz fresh lemon juice, 1/2 oz rich simple syrup, and 1 egg white into a cocktail shaker without ice.
  2. Step 2: Dry shake vigorously for 20 seconds to emulsify the egg white.
  3. Step 3: Fill the shaker with ice cubes and shake again for 15 seconds until the outside is frosty.
  4. Step 4: Double strain into a chilled coupe glass to ensure a smooth texture.
  5. Step 5: Add 2 dashes of Angostura bitters on the foam and use a toothpick to create a decorative pattern.
  6. Step 6: Garnish with a thin lemon twist, expressed over the glass to release oils, then placed on the rim.

Frequently asked questions

How long does Pascal’s Precision Sour take to make?

Total time is about 7 minutes (7 min prep + 0 min cook). Most home bartenders find this fits a single afternoon; scale up the batch for parties or pitchers.

How do I store leftover Pascal’s Precision Sour?

Refrigerate any leftover pascal’s precision sour in a sealed pitcher or jar for up to 3–4 days. Do not reheat — drinks are served chilled. If the recipe uses sparkling water or fresh herbs, hold those back and add fresh just before pouring so the drink stays bright and fizzy.

Can I substitute ingredients in Pascal’s Precision Sour?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Pascal’s Precision Sour for a different number of people?

The recipe is written for 1 servings. Multiply each ingredient by (your serving target / 1). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Pascal’s Precision Sour?

Cocktails cocktails & drinks like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.