LOVE these kind of rich cinnamon muffins or coffeecake. Nothing better to wake up to on a weekend morning! Even if I am the one to have to get up to make them! Worth it! JessBenbow, I have not used the cinnamon filling yet, but I can tell you about a brown sugar, cinnamon, butter, nut filling I use, similar to the above mentioned substitution. I have made both the KAF, GF mix and my own muffins, and muffin tops. I have found that it works well in both recipes. When I feel something added will be heavy, as the nut filling as mentioned, I will let the batter set a few minutes and it thickens just a bit, so I am confident it won't fall to the bottom, or remain doughy after baking. I do not use a packed ice cream type scoop, but a regular large tablespoon, and it spreads it out more, so it "marbles", rather than looks like a 'filled cupcake' in the batter. I think that helps with the nature of GF batters. Also, I use the GF cake enhancer and Xanthan gum as called for in recipes, and find these help when adding extra ingredients. It is all good! and delicious! Good luck, Catie Thanks for the great tips! We learn so much from our customers. Elisabeth

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