Reese's peanut butter cups Candies 1 package 1.6 oz 2 cups 231.8 calories 24.9 grams carbs 13.7 grams fat 4.6 grams protein 1.6 grams fiber 2.7 mg cholesterol 4.8 grams saturated fat 160.7 mg sodium 21.2 grams sugar 0 grams trans fat You searched for "Reese's Peanut Butter Cup". Calorie breakdown: 51% fat, 41% carbs, 8% protein. There are 105 calories in 1 piece (15 g) of Reese's Peanut Butter Cup. Get full nutrition facts for other Reese's products and all your other favorite brands. Calories, fat, protein, and carbohydrate values for for Reeses Peanut Butter Cup and other related foods. There are 88 calories in 1 individual Reese's Peanut Butter Cup.