For the first step, lay your fabric out flat and place your binder on top.
Leaving about an inch of edging, cut around the binder
Now fold that edge inward, meeting at the binder edge and pin them in place.
Sew the trim down all the way around. (If you want a pocket or ribbons or buttons on the cover, do this before moving on to the next step.)
Lay the fabric down again (facing up) and place the binder back on top. Cut your second color of fabric to match the size of one side of the binder, leaving about an inch and a half of space from the center like shown above. Face the material down (like I've shown you above) and fold the edge over, pin and sew down.
Pin the edges of the top and bottom together. Slide the binder out and sew the edges together.
Repeat on the other side and flip the fabric inside out. Slide your binder back in and tada!
Here's the inside of my cookbook. To keep it personal, it includes photos of family members baking cookies...I'll go into more details about the contents of my cookbook on another day.