Preheat the oven to 350 °F and line a baking dish with parchment paper.
To make the crepes, add all ingredients into a blender or mix with an electric mixer. Blend for at least one minute and chill for one hour before using.
To make the sauce, melt one tablespoon of butter in a saucepan over medium heat. Add one tablespoon of Bisquick and mix until it forms a dough-like consistency.
Stir in three-quarters of a cup of chicken broth a little at a time, making sure each time is well incorporated.
Add one-half teaspoon of mustard, one-quarter of a teaspoon of worcestershire sauce, and one cup of the grated cheddar cheese. Mix until smooth.
Stir in the sour cream and mix until well blended.
Remove the crepe mixture from the refrigerator. Melt a teaspoon of butter in a heated skillet and add pour one-quarter of a cup of the mixture in. Rotate the skillet to cover the base and flip once bubbles form on the surface. Repeat for each crepe.
Place some chicken and broccoli into each crepe and gently roll-up.
Transfer the crepes to the prepared baking dish and pour the sauce over the top.
Sprinkle with the remaining cheese and bake covered for twenty minutes.
Uncover and continue baking for five minutes or until the top becomes golden brown.
Serve and enjoy.