CULTURED BUTTER COOKIES RECIPES

Steps:

• Combine cream and yogurt in a large jar or bowl. Seal jar well and shake aggressively until combined, or whisk well if using a bowl. Cover jar or bowl with a clean kitchen towel and let mixture sit in a warm area of your kitchen for 18 to 36 hours; it should thicken and taste rich and tangy.
• Seal the jar or cover bowl tightly with plastic wrap and refrigerate until it reaches 60 degrees, 1 to 2 hours. If you refrigerate it longer, allow mixture to warm slightly at room temperature before proceeding.
• Line a fine-mesh sieve with a double layer of cheesecloth and place it over a large bowl. Make sure there is plenty of extra overhang of cheesecloth.
• In the bowl of a food processor, add the thickened butter mixture and process on high until the yellow curds begin to separate from the buttermilk, 2 to 3 minutes. It will have the appearance of liquidy cottage cheese.
• Slowly pour the buttermilk through the mesh sieve and then dump the butter curds in. Let sit for 1 to 2 minutes, allowing buttermilk to drip through. Gather the ends of the cheesecloth up and around the butter, pushing the curds down and into a ball. Twist the cheesecloth and squeeze the ball to extract as much buttermilk as possible. You will be left with a butterball.
• Pour the buttermilk into a separate container and reserve for another use. Place the butterball in the empty bowl. Be sure to squeeze out all excess butter from the cheesecloth. Pour 1/3 cup of ice water over the butter and, using a spatula, “wash” the butter, folding it over itself and pressing down to extract the extra buttermilk. Drain off the milky liquid and discard it; repeat this process until the liquid is clear, 4 to 6 times. The butter will start to harden; at that point your hands may work better than the spatula.
• Place the butter on a clean kitchen towel and pat lightly to remove excess moisture. Knead a few times with your hands and pat dry again; this will help extend its storage life. Sprinkle the finished butter with salt and knead a few more times to combine.
• Lay out a sheet of parchment paper, or two if you would like to divide the batch in half, and place the butter on the paper. Form the butter into a log and then roll it up in the paper and twist the ends to seal. Make sure the log has a uniform thickness throughout. Refrigerate until ready to use. The butter will last about a month in the refrigerator.

Steps:

• Heat oven to 350 degrees and line 2 baking sheets with parchment paper or nonstick liners. In a mixer fitted with a paddle attachment, cream the butter and sugars until smooth and fluffy, at least 3 minutes. Add the peanut butter and eggs, and mix. Add the flour and salt and mix just until well combined, with no white flour showing.
• Using a small cookie scoop (about 2 teaspoons capacity), scoop dough onto prepared pans. The tops will be rounded but craggy. The cookies will not spread much or change shape when they bake, so they can be placed quite close together, but leave room for air circulation so they can brown.
• In a small bowl, mix 2 tablespoons sugar with 1 tablespoon salt. Sprinkle each cookie lightly with sugar-salt mixture, getting it into the crags and crannies. Bake 12 to 15 minutes, until cookies are set and golden-brown. Carefully lift or slide off baking sheets and cool on racks. Store in layers separated by parchment paper, in airtight containers.