1 This Is An Optional Step. Preheat Oven To 300 F. Place Pecan Halves On A Baking Sheet In A Single Layer And Toast For 10 Minutes, Turning Once. Let Cool. 2 Line Two Baking Sheets With Parchment Paper Or Silpat And Set Aside. Mix Together White And Brown Sugar And Baking Soda In A 3-Quart Saucepan. Stir In Light Cream And Place Over Medium To Medium-High Heat. Cook, Whisking Occasionally, Until Mixture Reaches 235