Costco’s key lime pie has earned a devoted following among warehouse shoppers. With its creamy texture, tangy lime flavor, and generous size, it’s become a go-to dessert for parties and family gatherings. But if you’re watching your calorie intake, you might be wondering just how indulgent this popular treat is.
A single slice of Costco’s key lime pie contains approximately 410 calories. Given that the entire pie is typically cut into 12 servings, you’re looking at nearly 5,000 calories for the whole dessert. While these numbers might seem daunting, understanding the full nutritional picture can help you make informed choices about when and how to enjoy this dessert.
Breaking Down the Nutritional Profile

Beyond calories, Costco’s key lime pie packs a significant nutritional punch. Each slice contains roughly 26 grams of fat, 37 grams of carbohydrates, and 6 grams of protein. The high fat content comes primarily from the cream cheese filling and graham cracker crust, while the carbohydrates stem from added sugars and the crust itself.
The sodium content sits at about 350 milligrams per slice, which represents roughly 15% of the recommended daily intake. For those monitoring their sodium consumption, this is worth considering alongside other meals throughout the day.
How It Compares to Other Desserts

When placed alongside other popular desserts, Costco’s key lime pie falls into the moderate-to-high calorie range. A slice of cheesecake from a restaurant typically contains 400-500 calories, while a piece of apple pie averages around 320 calories. Homemade key lime pie often contains fewer calories per slice, usually ranging from 280 to 350 calories, depending on the recipe and portion size.
The warehouse format means larger portions, which naturally increases the calorie count. However, the price per serving often makes it more economical than purchasing individual dessert portions elsewhere.
Smart Strategies for Enjoying Key Lime Pie

You don’t need to avoid this dessert entirely to maintain a balanced diet. Consider cutting smaller portions than the suggested 12 slices—dividing the pie into 16 pieces reduces each serving to roughly 310 calories.
Pairing a slice with fresh berries can add fiber and vitamins while helping you feel satisfied with a smaller portion. The natural tartness of strawberries or raspberries complements the lime flavor beautifully.
Planning also makes a difference. If you know you’ll be having key lime pie for dessert, you might choose lighter options for lunch or skip an afternoon snack to accommodate the extra calories.
When to Indulge Mindfully

Special occasions provide the perfect opportunity to enjoy higher-calorie treats without guilt. Birthday parties, holiday gatherings, and celebrations are times when the social and emotional benefits of sharing dessert often outweigh strict calorie counting.
For everyday consumption, consider saving key lime pie for days when you’ve been particularly active. A long hike, intense workout session, or physically demanding day can help offset the caloric impact.
Making Room in Your Daily Routine

The 410 calories in a slice of Costco key lime pie represent roughly 20% of a 2,000-calorie daily diet. This means you can work it into your eating plan with some simple adjustments to other meals.
Consider having a lighter lunch with plenty of vegetables and lean protein, or opt for a smaller breakfast if you know dessert is on the evening menu. The key lies in balance rather than restriction.
Storage and Serving Tips

Proper storage helps you control portions over time. The pie keeps well in the refrigerator for up to five days, and individual slices can be frozen for up to three months. This allows you to enjoy single servings without the temptation of having an entire pie available.
Serving the pie slightly chilled enhances its refreshing qualities and can make smaller portions feel more satisfying. A dollop of light whipped cream or a small garnish of lime zest adds visual appeal without significantly increasing calories.
Finding Your Balance
Costco’s key lime pie doesn’t have to be off-limits if you’re mindful about portions and frequency. At 410 calories per slice, it’s a substantial dessert that can fit into a balanced eating plan when enjoyed occasionally and paired with lighter choices throughout the day.
The key lies in viewing it as an occasional treat rather than a regular indulgence. By understanding the nutritional content and planning accordingly, you can savor every tangy, creamy bite without derailing your health goals.