The Caloric Breakdown: How many calories are in a slice of Oreo mousse cake?

November 6, 2025 •

4 min read

According to nutritional data, a single slice of pre-cut Oreo mousse cake typically contains between 370 and 390 calories, though the number can vary significantly depending on the recipe and portion size. Understanding precisely how many calories are in a slice of Oreo mousse cake? is essential for anyone aiming to manage their diet while still enjoying an occasional treat.

Quick Summary

The calorie count for a slice of Oreo mousse cake varies based on ingredients, portion size, and preparation method. Commercial versions contain approximately 370-390 calories, while homemade and restaurant slices can be much higher due to richer ingredients.

Key Points

Variable Calorie Count: The number of calories in a slice of Oreo mousse cake varies significantly, from roughly 370-390 calories for store-bought versions to potentially over 700 calories for homemade or restaurant slices.
High in Fat and Sugar: Due to ingredients like heavy cream, sugar, and Oreos, the dessert is generally high in fat and simple carbohydrates, with lower protein content.
Mindful Indulgence: The key to fitting this treat into a diet is moderation and mindful eating, including controlling portion sizes or sharing with others.
Healthier Alternatives: Homemade versions can be made with healthier ingredient swaps, such as using Greek yogurt, sugar-free pudding mix, and low-calorie sweeteners to significantly reduce the calorie count.
Context is Crucial: The calorie count depends heavily on the recipe and serving size, so paying attention to what's in your cake is more informative than relying on a single number.
Balanced Diet Perspective: Enjoying an Oreo mousse cake as an occasional indulgence is acceptable within a diet focused on limited sugars and saturated fats, coupled with regular physical activity.

The Calorie Breakdown of Oreo Mousse Cake

When considering how a dessert like Oreo mousse cake fits into a balanced diet, the first step is to understand its caloric load. The calorie content is not a single, fixed number but rather a range influenced by several factors, including whether it's a pre-packaged, homemade, or restaurant-made slice.

The Range of Calories

For pre-packaged or store-bought pre-cut slices, which are typically standardized, the calorie count is more consistent. Data from various nutrition trackers shows figures such as 370 calories for a 97g slice and 390 calories for a 113g slice. However, the calorie count for homemade versions can vary dramatically, often leaning towards the higher end. Recipes from baking blogs can report calorie counts upwards of 500 calories per slice, and some online calorie estimators for generous 6-ounce portions suggest figures between 650 and 800 calories. This wide range is a testament to the dessert's ingredient variability.

Key Factors Influencing Calorie Count

Several components of Oreo mousse cake contribute significantly to its total calorie count:

Heavy Cream: A primary ingredient in mousse and whipped toppings, heavy cream is calorie-dense due to its high fat content.
Sugar: Added sugars in the mousse, cake layers, and frosting pile on the calories with little to no nutritional value.
Oreo Cookies: The cookies themselves are a source of carbohydrates and fat. The more cookies used in the crust, the mousse, and for decoration, the higher the calorie count.
Cheesecake or Cream Cheese: If the recipe incorporates a cheesecake-style layer or features cream cheese, it adds a considerable amount of calories from fat and dairy.

Decoding the Macronutrients

Beyond just the calorie count, the macronutrient profile reveals the nutritional composition of Oreo mousse cake. For a slice containing around 390 calories, the breakdown is often characterized by a high proportion of fat and carbohydrates and a lower amount of protein.

Fat: A standard slice can contain around 20-26g of fat, with a high percentage being saturated fat from ingredients like cream and butter. A high intake of saturated fats can increase the risk of heart disease.
Carbohydrates: Carbohydrates, primarily from sugar and the Oreo cookies, can range from 31-45g per slice. This includes a high amount of added sugars, which the World Health Organization recommends limiting for health benefits.
Protein: The protein content is relatively low, typically ranging from 4-10g per slice, depending on the specific ingredients used.

A Comparison of Desserts: Oreo Mousse vs. Other Cakes

To put the calorie count of Oreo mousse cake into perspective, it's useful to compare it to other popular desserts. Portion sizes are assumed to be similar (e.g., standard slice or serving). This table highlights the variability in calories across different types of treats.


Dessert Type	Estimated Calories (per slice)	Key Calorie Drivers
Oreo Mousse Cake	370–800+	Heavy cream, sugar, crushed Oreos
Classic Vanilla Cake	250–350	Butter, sugar, and simple frosting
Chocolate Fudge Cake	450–600+	Rich chocolate, buttercream or fudge frosting
Red Velvet Cake	350–400	Cream cheese frosting, sugar
Plain Cheesecake	400–600	Cream cheese, sugar, and crust

Creating a Healthier Oreo Mousse Cake at Home

For those who enjoy baking and want to control their dessert's nutritional content, several swaps can significantly reduce the calorie count without sacrificing flavor. A homemade, healthier version could use the following alternative ingredients:

Greek Yogurt: Swap out some or all of the heavy cream or cream cheese for plain, non-fat Greek yogurt to reduce fat and increase protein.
Sugar-Free Pudding Mix: Use sugar-free instant pudding mix to achieve a thick, creamy mousse texture and flavor without the added sugars.
Low-Calorie Sweeteners: Replace some or all of the sugar with a low-calorie alternative to reduce the total carbohydrate load.
Oreo Thins: Use Oreo Thins instead of regular Oreos, or reduce the number of cookies in the recipe to cut down on calories.
Almond Milk: Incorporate unsweetened almond milk instead of regular milk for a lighter liquid component.

For a truly nutritious diet, the World Health Organization recommends a diet low in free sugars and saturated fats and high in fruits, vegetables, and whole grains. While a slice of Oreo mousse cake is not part of that daily recommendation, enjoying a homemade, portion-controlled version can be a satisfying way to manage cravings. Making healthier ingredient substitutions offers an enjoyable way to indulge mindfully.

Conclusion: Sweet Treats and Balanced Nutrition

Ultimately, the question of 'how many calories are in a slice of Oreo mousse cake?' is best answered with a focus on context. While a standard slice from a store may be around 370-390 calories, a decadent restaurant or homemade version can push well over 500 calories due to richer ingredients and larger portion sizes. Fitting this dessert into a balanced diet is all about mindfulness and moderation. By being aware of the ingredients and portion size, or by choosing a healthier, homemade alternative, you can enjoy a sweet treat without derailing your nutritional goals. An occasional indulgence is perfectly acceptable as part of a generally healthy and active lifestyle. The key is balance and informed choice, not complete restriction.

Mindful Indulgence

Instead of completely eliminating your favorite desserts, consider enjoying them in moderation. Cutting a smaller slice or sharing it with a friend are simple ways to manage your calorie intake. The pleasure of a dessert is often in the taste, so savoring each bite can make a small portion feel more satisfying.

The Importance of Activity

It's also worth noting that calories are just one part of the equation. Balancing your energy intake with energy expenditure is crucial for weight management. A physical activity like a 46-minute jog could help burn off a 370-calorie slice of cake. This holistic approach to nutrition and lifestyle can accommodate treats like Oreo mousse cake without compromising your overall health.

Frequently Asked Questions

A typical pre-cut, store-bought slice of Oreo mousse cake is often in the range of 370 to 390 calories. The precise number will depend on the brand and exact portion size.

Homemade cakes can be significantly higher in calories because recipes may use richer ingredients, more sugar, more heavy cream, and larger portion sizes compared to standardized, mass-produced versions.

To reduce the calorie content, you can substitute heavy cream with Greek yogurt, use sugar-free pudding mix, opt for low-calorie sweeteners, and decrease the number of Oreo cookies.

Compared to other cakes, Oreo mousse cake's calories can be comparable or higher, especially if it is a rich, restaurant-style version. For example, a standard slice of vanilla cake has fewer calories, while a decadent chocolate fudge cake or cheesecake can have similar or higher counts.

Oreo mousse cake is not ideal for regular consumption during weight loss due to its high calorie, fat, and sugar content. It's best reserved as an occasional, controlled indulgence in a diet focused on whole, nutritious foods.

The main macronutrients are carbohydrates and fat, with both making up a large portion of the cake's calorie content. The protein content is relatively low.

Managing calorie intake involves mindful eating, which includes controlling portion sizes, choosing lighter alternatives when possible, and balancing treats with regular physical activity.