Rinse the chicken livers under cool water, then pat them very dry with paper towels. Place on a cutting board and trim away any visible fat, connective tissue, or discolored/greenish spots. Discard trimmings.
1 pound chicken livers
In a large skillet, heat 2 tablespoons of the butter and the olive oil over medium heat. Add the chopped shallot and cook for 3–4 minutes, stirring, until softened and translucent. Add the minced garlic and cook for 30–60 seconds, just until fragrant, without browning.
1 small shallot, 2 cloves garlic, 8 tablespoons unsalted butter, 2 tablespoons olive oil
Add the trimmed chicken livers to the skillet in a single layer. Season with the salt, pepper, and thyme. Cook over medium heat, turning occasionally, for about 4–6 minutes, until browned on the outside but still slightly pink in the center. Do not overcook or the pate may become grainy.
1 pound chicken livers, 1/4 cup heavy cream, 1 teaspoon fresh thyme leaves, 1/2 teaspoon kosher salt, 1/4 teaspoon freshly ground black pepper
Carefully pour in the brandy (or cognac or sherry). It will sizzle and steam. Use a wooden spoon to scrape up any browned bits from the bottom of the pan. Let the liquid simmer for 2–3 minutes, until reduced by about half. Remove the pan from the heat and let the mixture cool for about 5 minutes.
1/4 cup brandy
Transfer the warm liver mixture to a food processor or high-speed blender. Add the remaining butter (about 6 tablespoons, cut into pieces), the heavy cream, and a pinch of allspice or nutmeg if using. Blend until completely smooth and velvety, scraping down the sides as needed. Taste carefully and adjust seasoning with more salt and pepper if needed.
1 pound chicken livers, 8 tablespoons unsalted butter, 1/4 cup heavy cream, 1/2 teaspoon kosher salt, 1/4 teaspoon freshly ground black pepper, pinch ground allspice or nutmeg
For the smoothest, restaurant-style texture, press the blended mixture through a fine-mesh sieve into a bowl or large measuring cup, using a rubber spatula to push it through. Discard any fibrous bits left in the sieve.
Pour or spoon the pate into small ramekins, jars, or a single crock. Smooth the tops and tap the containers gently on the counter to release air bubbles. Cover and refrigerate for at least 3–4 hours, or until fully chilled and set. For best flavor, chill overnight.
If desired, melt 2–3 tablespoons butter and let cool slightly. Pour a thin, even layer over the surface of the chilled pate to seal. Refrigerate again until the butter is firm before serving.
2 tablespoons unsalted butter
Before serving, let the pate sit at room temperature for 15–20 minutes to soften slightly. Serve with toasted baguette slices, crackers, sliced apple or pear, cornichons, and grainy mustard, as desired.
Toasted baguette slices, crackers, sliced apples or pears, cornichons, and grainy mustard