Preheat your oven to 350°F (175°C). Line a standard 12-cup muffin pan with silicone or parchment paper liners for easy cleanup.
In a large bowl, place the pecan butter. Give it a good stir to blend in any separated oils. If it's very thick, you can gently warm it in the microwave for a few seconds until it's smoother.
Whisk in the brown erythritol blend and vanilla extract until everything is well combined. Then, add the eggs one at a time, whisking until the mixture is smooth and creamy.
Now, add the chocolate collagen protein powder, cocoa powder, baking powder, and salt to the bowl. Stir gently until all the dry ingredients are just incorporated into the wet mixture.
Gently fold in the sugar-free dark chocolate chips until they are evenly distributed throughout the batter.
Divide the healthy batter evenly among your prepared muffin cups. Bake for about 18 to 25 minutes, or until the muffins have risen nicely and feel just firm to the touch on top.
Take the muffins out of the oven and let them cool completely in the pan. These delicious, protein-packed muffins are perfect for a healthy start or a satisfying snack!