Here is one suggestion for a brown sugarless substitute:

Brown Sugar Substitute

From Carroll Pellegrinelli, Your Guide to Desserts / Baking

1 cup artificial sweetener*
1/4 cup sugar-free maple syrup

Mix ingredients well.

Replaces 1 cup of regular brown sugar to be used when baking.

*Use the type of sweetener that measures 1 cup to 1 cup of granulated sugar.

Here is a link to

Splenda Brown Sugar Blend

Brown Sugar Blend

Splenda Brown Sugar Blend has real sugar in it.

Soobee, I realize it does, however, reducing carbs is also a good thing. I am still on the hunt for the absolute best alternative. I ran across a diabetic brown sugar product.

Here is the link:

Diabetic Brown Sugar

Thanks, however, this is the first recipe at the top of the list. Here is another solution recommended by our own Melodie.

Whey Low Brown Sugar Substitute