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["Preheat oven to 400u00b0F Place a rack in the upper third. Place 2 mini-muffin tins (2"" diameter cups, 24 total) on a cookie sheet. If your muffin tins are not non-stick, spray liberally with non-stick spray.", "NOTE: If you cannot find pistachio paste ready-made, you can make your own; combine 1/4 cup shell-less unsalted pistachios and 1/4 cup powdered sugar in a food processor. Process until nuts are finely ground, then add 1-3 tbsp water, until the desired consistency is achieved. (This will probably make a little more than you need.).", "Beat the butter with a stand or hand mixer until fluffy, about 2 minutes. Add the sugar and beat until smooth. Scrape the bowl with a rubber spatula, then add pistachio paste and vanilla. Beat until smooth again. Add the eggs one at a time, blending well after each addition and scraping the sides of the bowl often.", "Sift the flour and salt in a bowl. Add half the dry ingredients to the wet and blend well; add the remaining dry and blend well again. Divide batter evenly amongst the muffin cups. Place 3 pistachios into each muffin cup; do not press down.", "Bake 13-15 minutes until light golden brown and a toothpick inserted in the center of one cup comes out clean. Place on a rack to cool completely, then remove from pan. Dust tops with confectioner's sugar before serving.", "Leftovers will last 4 days at room temperature, wrapped airtight in foil. They may also be frozen up to 4 months, wrapped in several layers of plastic wrap and foil. Defrost frozen cakes in refrigerator overnight, then bring up to room temperature before serving."]
