Every oven is different. Cook the first batch, watching carefully, and if too brown, reduce heat to 325 degrees. Rotate pan halfway through baking time. Use more than one baking sheet at a time only if the sheets may be placed in the oven without overlapping. Air must freely circulate or the bottoms will be burned and the tops unbrowned. Switch shelves and positions of the pans as necessary to prevent top or bottom from browning. Take care: white cheese will not brown as much as yellow. Once the aroma comes wafting out of the oven, they are usually done. Cooking further may burn the cheese. Remove with a metal spatula to cool on a rack. These keep several days at room temperature in a tightly sealed container, or frozen up to 3 months. Due to the heavy humidity in the South, it may be necessary to re-crisp straws on a baking sheet in a 300-degree oven. Variation: Use cookie cutters, a pastry bag, or an indented pizza slicer to shape cheese straws. Cut into coins, triangles, hearts, or specialty shapes for special parties.