Start by gathering your basic ingredients and making sure your food processor is clean and dry. Add the white granulated sugar and molasses to your food processor bowl. The molasses will seem like a small amount compared to the sugar, but it's exactly the right ratio for perfect brown sugar.

Pulse the mixture on high speed for about 1 minute. You'll see the molasses start to distribute throughout the sugar, creating that familiar brown color. Remove half the mixture and set aside in a mixing bowl. Continue blending the remaining sugar for another minute until no major clumps of molasses remain.

Transfer this batch to its own bowl, then process the reserved sugar mixture for another minute. This two-batch method ensures even distribution and the best results. Combine both batches and mix well. Your homemade brown sugar is ready to use!