Melt 5 Tbsp butter and combine with bread crumbs in a pie plate. Press into a crust and refrigerate 30 minutes.
Cook bacon until crisp. Saute onion in 3 Tbsp butter until golden. Crumble bacon and layer bacon and onion in crust. Combine milk and eggs and pour over bacon and onion. Top with cheese. Bake at 350 degrees for 25 minutes.