Here’s the ingredients list from the Starbucks website. Bottom line up front, they contain rice starch in addition to questionable ingredients in the cheeses, etc.
So not really just eggs, bacon and cheese.
Ingredients
cottage cheese (cultured skim milk, skim milk, milk, cream, contains 2 % or less of: whey, lactose, salt, maltodextrin, guar gum, citric acid, carrageenan, mono- and diglycerides, locust bean gum, xanthan gum, carob bean gum, potassium sorbate, carbon dioxide [to maintain freshness], natural flavor, vitamin a palmitate, enzymes), eggs (eggs, citric acid), monterey jack cheese (pasteurized milk, cheese culture, salt, enzymes, potato starch, powdered cellulose, natamycin [a natural mold inhibitor]), unsalted butter (pasteurized cream, natural flavors), gruyere cheese (pasteurized part-skim milk, cheese culture, salt, enzymes, potato starch, powdered cellulose, natamycin [a natural mold inhibitor]), uncured bacon - no nitrites or nitrates added except as naturally occuring in sea salt and celery juice powder (pork belly, water, sea salt, cane sugar, natural flavors), rice starch, hot sauce (distilled vinegar, red pepper, salt), salt. contains: egg, milk.