Preheat the oven to 180C/350F. Place 12 paper cupcake/muffin liners in a 12-count muffin tin. Lightly grease it to ensure muffins don't stick.
In a large mixing bowl, add your dry ingredients and mix well. In a separate bowl, add your wet ingredients and mix together. Combine the wet and dry ingredients, before folding through your chocolate chips and raspberries, if using them.
Evenly distribute the muffin batter amongst the 12-muffin pans. Top with extra raspberries and chocolate chips and bake for 20-25 minutes, or until a skewer comes out just clean.
Remove muffins from the oven and let cool in the muffin tin for 10 minutes, before carefully removing and placing on a cooling rack.
Keto breakfast muffins should be stored in a sealed container, in the fridge.They can also be stored in the freezer.