Hi Woody, Yeast works by consuming sugar (either added sugar or sugar in wheat flour), so it would not work with these ingredients. You could try adding some yeast *and* some sugar (knowing that the yeast would consume most of it), but I haven’t experimented with that. Aside from that, mixing the batter well can help create more air bubbles, and make sure you are using fresh baking powder.
Creaming the butter properly with the sweeter is paramount here to build a nice structure for the cookies (think rise and crunch!). And creaming with sweetener, in case you haven’t done it before, takes a bit longer to incorporate than with good-old sugar. But don’t give up, and keep going until you’ve got the sweetener well incorporated into soft and fluffy butter. 

Baking with coconut flour is a little tricky since it absorbs a lot of water. For every 1 cup of coconut flour, you'll need to add 1 cup of water and six eggs. Substitute 1/4 to 1/3 cups of coconut flour for every 1 cup of all-purpose flour. Another option is a blend of 3 parts almond flour to 1 part coconut flour. Coconut flour is a little higher-carb than nut or seed flours with 16 grams of carbohydrates per 1/4 cup.
To replace 1 egg, mix 1 tbsp ground flax meal with 3 tbsp of water and allow it to swell. This can be used to replace the eggs but it will not give to properties that eggs do. Eggs help bind the ingredients, eggs help the baking become light, fluffy and rise. Eggs help emulsify the mixture. This formula is used in many vegan recipes or those who are allergic to eggs. If a recipe is heavily based on eggs, this substitution will not work.
Thanks for posting about the psyllium Sarah,, I tried psyllium flakes 10g and they turned out great. Not even very fragile. It just gets thick so the batter doesn’t self-level, I had to do my best, and the thick spots required 1 extra minute in the oven. Used immediately in a skillet lasagne- just ground beef, jar of pasta sauce, mozz cheese and cream cheese. Definitely wouldn’t have been much of a lasagne without the “pasta”! So these noodles are my hero 🙂
For cavatelli: cut dough into 4 pieces, roll out into even-sized logs and slice off even-sized pieces. This will ensure evenly-sized pasta. Lightly dust the board and pasta pieces with coconut flour. Place a piece on the board and using a knife press the dough towards you, angling the knife tip upwards as you press (see post for gif images), making the pasta curl into shape. 
While low-carb simply describes a vague behavior pattern that is subject to each person, ketosis is an objective and measurable fat-burning state of the human body. It is when the body’s metabolism switches gears to burn fat for energy instead of sugar. It is this metabolic state in which people experience the full benefits of a ketogenic lifestyle.
Thank you so much for giving me back bolognese! Low carb eating wasn’t really a hard switch for me except missing Italian food. I doubled the recipe and used a 9×13 pan to bake them. The most unusual thing was that the center set before the edges, usually it’s the other way round. These noodles topped with bolognese, served with keto garlic bread, I though I was in heaven!

Louise holds a Bachelors and Masters in Natural Sciences from Cambridge University (UK). She attended Columbia University for her JD and practiced law at Debevoise & Plimpton before co-founding Louise's Foods, Paleo Living Magazine, Nourishing Brands, & CoBionic. Louise has considerable research experience but enjoys creating products and articles that help move people just a little bit closer toward a healthy life they love. You can find her on Facebook or LinkedIn.

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