Equipment
Ingredients
Aromatics and Herbs
- 25 g flat-leaf parsley, leaves picked and washed thoroughly dry
- 10 g fresh chives, trimmed and dried
- 1 garlic, peeled
- 3 g lemon zest, finely grated
Fat and Seasoning
- 200 g unsalted butter, softened at room temperature (18°C to 20°C / 64°F to 68°F)
- 30 g anchovy fillets in oil, drained of excess oil
- 10 ml fresh lemon juice, strained of seeds and pulp
- 1 g black pepper, freshly cracked
Nutrition (per serving)
Nutrition is estimated per serving. Nutrients without complete source data are omitted.
Full nutrition
- Calories
- 85 kcal
- Protein
- 1 g
- Carbohydrates
- 0 g
- Fat
- 9 g
- Fiber
- 0 g
- Sugar
- 0 g
- Sodium
- 63 mg
- Saturated Fat
- 6 g
- Monounsaturated Fat
- 3 g
- Polyunsaturated Fat
- 0 g
- Cholesterol
- 25 mg
- Potassium
- 24 mg
- Calcium
- 10 mg
- Iron
- 0.2 mg
- Magnesium
- 3 mg
- Phosphorus
- 8 mg
- Zinc
- 0.1 mg
- Vitamin A
- 83 mcg
- Vitamin C
- 3 mg
- Vitamin D
- 0.0 mcg
- Vitamin E
- 0.3 mg
- Vitamin K
- 25 mcg
- Vitamin B6
- 0.0 mg
- Vitamin B12
- 0.0 mcg
- Thiamin
- 0.00 mg
- Riboflavin
- 0.01 mg
- Niacin
- 0.4 mg
- Folate
- 3 mcg
- Water
- 5 g
Sources: Aggregated Public Data, USDA FoodData Central
Method
Wash the flat-leaf parsley and fresh chives, then dry them completely using clean kitchen towels or a salad spinner, ensuring no residual water remains on the leaves.
Finely zest the lemon using a microplane zester until you collect 3g of yellow zest, taking care to exclude the bitter white pith beneath.
Roughly chop the dried flat-leaf parsley leaves, fresh chives, and peeled garlic clove on a cutting board using a chef's knife.
Place the chopped parsley, chives, garlic, 3g lemon zest, and 30g drained anchovy fillets into the bowl of a food processor, then pulse in short 1-second bursts for 30 seconds until a finely textured aromatic paste forms.
Scrape down the sides of the food processor bowl with a silicone spatula, then add 200g of softened unsalted butter and process continuously for 45 seconds until light, smooth, and uniformly green.
Add 10ml fresh lemon juice and 1g freshly cracked black pepper to the food processor, then pulse 5 to 6 times until the acid is fully emulsified into the butter fat without separation.
Lay a 30 cm sheet of parchment paper flat on the counter and scrape the butter mixture onto the center using a silicone spatula, shaping it into a rough horizontal log.
Fold the top half of the parchment paper over the butter and roll it backward with a straight edge or cutting board to form a tight, smooth cylinder roughly 4 cm (1.5 inches) in diameter, twisting both ends tightly to seal.
Transfer the rolled butter log to the refrigerator at 4°C (39°F) and chill for 45 minutes until completely firm before slicing into coins or using as desired.
Chef's Notes
- Anchovies act as a natural source of inosinate and glutamate; their briny cured character melts into pure savory richness without fishy aftertaste once exposed to heat.
- For tossing with popcorn, melt 30g of butter over gentle heat below 45°C (113°F) and drizzle immediately over 100g of freshly popped, piping-hot kernels to bloom the herb aromatics instantly.
- When finishing pasta, cook pasta until al dente, drain while reserving 60ml starchy water, and vigorously swirl 45g of chilled butter rounds into the warm noodles off the burner for an instantaneous glossy sauce.
- For basting proteins such as pan-seared white fish or steaks, spoon cold butter coins into the skillet during the final 60 seconds of cooking, spooning the foaming herb fat continuously over the exterior.
Storage
Refrigerator: 2 weeks — Store wrapped tightly in parchment paper inside an airtight container at or below 4°C (40°F) to prevent fat oxidation and odor absorption.
Freezer: 3 months — Pre-slice the chilled log into 15g rounds and freeze in a single layer on a parchment-lined tray before transferring to a zip-top freezer bag.
Reheating: Melt gently in a pan over low heat below 45°C (113°F) to prevent splitting, or drop cold directly into warm pasta or hot popcorn.
Troubleshooting
Butter looks broken, curdled, or leaks watery lemon juice droplets
Cause: The butter was either too warm and oily when processed, or the lemon juice was pulsed in too aggressively
Fix: Chill the processor bowl in the refrigerator for 10 minutes, then pulse for 10 seconds to rebind the fat and liquid phases
Prevention: Ensure butter stays around 18°C to 20°C (64°F to 68°F) rather than half-melted, and add the citrus juice in short pulses
The compound butter turns dull army green or gray-brown
Cause: Excess moisture remained on the parsley leaves or the blades overheated during pureeing, breaking down chlorophyll
Fix: Cannot be fixed once oxidized, but flavor and safety remain completely unaffected
Prevention: Spin or pat the herbs thoroughly bone-dry and use quick pulse intervals to prevent frictional heat buildup
Butter feels unpleasantly greasy and coats the palate heavily when melted over pasta
Cause: Butter was added directly into boiling sauce, causing milk solids and butterfat to separate completely
Fix: Vigorously whisk in 15ml of hot starchy cooking water off the heat to pull the broken fat back into a creamy emulsion
Prevention: Remove pasta from active heat and swirl the cold compound butter vigorously off the flame with starchy cooking water
Cultural Context
Compound butters (beurres composes) have formed the backbone of classical French saucing technique since the nineteenth century, developed to finish grilled foods with immediate sheen, aroma, and rich mouthfeel. Marrying cured Mediterranean anchovies with fresh herbs mirrors regional French beurre d'anchois and northern Italian salsa verde traditions, utilizing dairy fat to temper and elevate intense cured seafood.
