Calories per Ingredient. Here are the foods from our food nutrition database that were used for the nutrition calculations of this recipe. Calories per serving of Mini Croissant Sandwich. 115 calories of Croissant, (1 croissant, mini) 57 calories of Cheddar Cheese, (0.50 slice (1 oz)) 50 calories of Turkey, Louis Rich Smoked White Turkey, (0.50 serving)