Cook and stir the mixture over medium heat, uncovered, until thickened and bubbly. Here are some more tasty cookie recipes for you to try this Summer. Sarah Carey shares a recipe that uses the pressure-cooker setting on an Instant Pot to create this St. Patrick's Day classic in under two hours. Pour into the top of a double boiler set over simmering water; cook and stir until thick and smooth, 5 to 10 minutes. Stir in sugar, lemon juice, melted butter, and lemon rind. Martha Stewart's Baking Handbook presents the doyenne of the Better Way in tip-top form. Meanwhile, prepare lemon curd. Stir in 2 teaspoons shredded lemon peel, the lemon juice, the 1/4 cup water, and the 2 tablespoons butter. In a medium saucepan, stir together the 2/3 cup sugar and the cornstarch. Cool at room temperature. Cooks.com - Recipes - Martha by Martha Stewart.This ideal cookbook for a busy life-style offers 52 sensational ... sugar and beat together 5 minutes more until thick and lemon colored. .... Royal Icing For Best Ever Sugar Cookies Recipe. Cookie dough recipe adapted from Martha Stewart’s Key Lime Thumbprint Cookies These Lemon Curd Thumbprint Cookies are perfect for a Summer tea party, Bridal or Baby Shower! Trusted Results with Martha stewart lemon cookies.