First, measure 2 cups of the ingredient *before* sifting. Then, sift that measured amount and weigh the sifted result. Use this weight for future recipes requiring 2 cups sifted of that ingredient.
The key to accurately converting a sifted volume measurement to weight is to mimic the original recipe's process. Here's a step-by-step guide:
Measure the Volume First: Using dry measuring cups, carefully measure out 2 cups of the ingredient *before* sifting. Level off the top of the cup with a straight edge (like the back of a knife) to ensure an accurate volume measurement.
Sift the Measured Ingredient: Now, sift the 2 cups of the ingredient through a sifter or fine-mesh sieve into a bowl. This aerates the ingredient and removes any lumps, replicating the 'sifted' condition specified in the recipe.
Weigh the Sifted Ingredient: Place the bowl with the sifted ingredient on a kitchen scale and record the weight in grams or ounces. This weight represents the equivalent of 2 cups sifted.
Record and Use: Write down the weight you obtained. When the recipe calls for '2 cups sifted' of that ingredient, use this weight instead of measuring by volume. This ensures consistency and accuracy in your baking or cooking.
By measuring the volume *before* sifting and then weighing the sifted result, you account for the volume change that occurs during sifting. Measuring and weighing *after* sifting would not accurately reflect the recipe's intended ingredient quantity.
Always use the same measuring cups and sifter for consistency. Different measuring cups can have slight variations in volume, and different sifters can aerate ingredients to varying degrees. Using the same tools each time will minimize discrepancies in your measurements.