High-Calorie Foods That Could Cause Weight Gain

If you've ever measured out a single serving of peanut butter, then you know that some foods are surprisingly high in calories. That doesn't mean you should avoid them—they can be packed with nutrients—but if you're aiming to stay within a certain daily calorie allowance, you'll probably want to familiarize yourself with how your favorite foods measure up in terms of calories as well as the other macronutrients. Whether you're working toward a weight loss goal or want to prioritize healthy high-calorie foods in order to gain weight, here are some calorie-dense foods you should know about.

Like other ancient grains, quinoa is a tasty and versatile protein source, that many dieters mistakenly believe is a much lower-calorie alternative to rice. In reality, one cup of cooked quinoa has 222 calories, putting it on par with brown rice (which has around 218 calories per cup). Enjoy it in your favorite healthy dish in a similar portion you'd use for rice or pasta (1/2 cup or about the size of your fist is a typical guideline).

They certainly aren't nutrition villains, but raisins are considered a 'calorically dense' food, meaning that you can consume a lot of calories by ingesting only a small amount. For example, one small 1.5-ounce box contains 129 calories. You can eat two full cups of grapes for the same amount, making this one snack you're better off substituting (if you're really hungry) in order to maximize your calories. (Pro tip: Fresh product also boosts your hydration.)

Rice cakes and crackers just sound lighter, don't they? Well, don't let their name distract you from their calorie count—most brands have as many calories per serving as their regular cracker counterparts. While they can have a place in your healthy diet, you're much better off snacking on something that fills you with nutrients too, not just empty calories.

A bowlful of Grape-Nuts cereal can pack in 416 calories (per cup, without milk). What is even more surprising is its sodium content. With 580 mg of sodium per cup (and it's not exactly packed with fiber either), there are much better breakfast options out there.

Peanut butter is one of the classic high-calorie foods for weight gain. It has a lot going for it, including the ability to help build muscle, burn fat, and even fight heart disease. But unless you're aiming for a calorie-rich diet, you'll probably want to avoid spooning it straight out of the jar multiple times a day. Two large spoonfuls can pack almost as many calories and fat as a Snickers bar. Peanut butter has about 100 calories per tablespoon, which is about the same as regular butter. (Are any other nut butters healthier? Here's our guide.)

A lot of nutrition pros consider chia seeds among the best high-calorie foods thanks to their fiber, omega-3, and protein content. While they're tiny, a single tablespoon still contains 70 calories, meaning you can easily add an extra 200 calories to that smoothie without even realizing it.

Don't get us wrong, we're huge fans of flavonoid-rich dark chocolate, it's just easy to get carried away with this delicious treat. Some bars can contain as much as 600 calories. The lesson? Just because it's dark doesn't mean it's low-calorie. "Too much [dark chocolate] may constipate you or leave you wired before bedtime," says Amie Valpone, Nutrition expert and author of The Healthy Apple blog.

With about twice the protein and only half of the carbohydrates as regular plain yogurt, Greek yogurt is an excellent food to include in your diet, especially if you're trying to lose weight. A 3/4-cup serving has about 150 calories. Most people can't handle the taste of plain Greek yogurt, and may end up smothering it in honey or other toppings to help sweeten the flavor—and rack up the total calorie count.

You don't need to deny yourself Greek yogurt, just stick to plain, and be mindful of your portions if you're looking to keep your calories in check.

"Gluten-free" has become a diet buzzword. And while you may choose (or need) to avoid gluten in your food, don't get tricked into thinking that eliminating gluten automatically means you'll lose weight. Those gluten-free cookies are still cookies and still contain calories—maybe even more than similarly sized regular cookies. Portion your gluten-free treats just like you would with any other dessert. (Related: Why Gluten-Free Diets Aren't Healthy for Everyone)

Don't let the "whole wheat" label fool you—most commercially prepared whole-wheat bread contains the same amount of calories (sometimes even more) than white bread. Be sure to check the label of your favorite brand—some 'reduced calorie' whole-wheat breads add more sugar or high fructose corn syrup to make up for the flavor lost with the extra calories. (Instead of whole wheat, you may want to opt for whole grain.)

Nuts like pecans are a great source of protein, heart-healthy fat, and tons of vitamins and minerals, and they also tend to be rich in calories. A 1-ounce serving of pecan halves contains 196 calories.

Just 2 tablespoons of olive oil add 238 calories to your meal—likely without you even realizing it. And when was the last time you stuck with a 2-tablespoon serving while cooking? Olive oil is full of healthy fat (the kind that may even help you lose weight), just remember that it's also full of calories.

This Mexican side dish is delicious, but it's not as low cal as its other bean counterparts—a single cup of canned refried beans will set you back about 237 calories (which doesn't include any cheese toppings). For a lower-calorie option, opt for refried pinto beans instead, which come in at only 180 calories per cup.

Coconut milk may have the potential to speed up your metabolism and help boost your weight-loss efforts, but that doesn't make it low-calorie. One cup of coconut milk has a hefty 552 calories and 57 grams of fat. Be sure to check your favorite brand's label if you're keeping an eye on your calorie consumption.

While no cheese is exactly a diet food, certain flavors pack a lot more calories than others into a very small size. Gruyere, Parmesan, and Manchego cheeses are some of the most calorie-dense—weighing in at around 120 calories per ounce. The typical recommended serving size for any kind of cheese is the size and shape of four dice.

This snack can cost you almost 700 calories per cup. Trail mix can include a wide range of ingredients, but you're almost always better off skipping store-bought brands and making your own at home to save on calories. Our suggestion: Mix 1 ounce of walnuts and about a teaspoon each of raisins and chocolate chips. The result is a satisfying snack for about 250 calories.

These naturally sweet and chewy fruits are a delicious whole-food alternative to candy. Dates are one of the healthy, high-calorie foods (with 23 calories each) that can have you racking up your daily intake fast if you eat them mindlessly.

Chickpeas are a great way to add fiber and protein to salads and soups, or even to enjoy as a standalone snack. One cup of canned chickpeas (a standard amount for side dishes) has 286 calories.

Though tofu is typically low in calories, watch out for baked or flavored packaged varieties, which can up the calorie content considerably (such as baked teriyaki tofu, which has 140 calories per 3 ounces). For a lower-calorie option, better to buy it plain and then flavor it up yourself with this quick tofu dinner idea.

The calories in ramen noodles have fueled many a student through college–one block of prepared ramen noodles has around 380 calories. If you're looking to turn the noodles into a more sophisticated, well-balanced meal, try out these healthy ramen noodle recipe ideas.

It has broccoli in it, how calorically-dense can it be? Depending on how its prepared, one cup of cream of broccoli soup could set you back almost 500 calories. To lighten it up, make your own soup at home, or try any of these filling, diet-friendly soup recipes instead.

While salmon is a very healthy protein source, it's not as light on calories as you might think. One salmon fillet (about a 6-ounce serving) could have about 400 calories and 20 grams of fat, according to the according to the FDA. Keep your serving size in check (3 ounces or about the size of your checkbook) and prepare yours at home if you want to avoid a high-calorie dish while still reaping the health benefits.

Guacamole is packed with heart-healthy and potassium-rich avocados, and it's also packed with calories. One cup (which sounds like a lot but is easy to eat during a party) contains about 360 calories. If you want to max out on guac, you can still trade your chips for veggies to cut out some calories.

One cup of homemade granola can serve up a full meal's worth of calories. At 597 calories and a whopping 29.4 grams of fat per cup (exact totals may differ based on ingredients), this is one of the foods you should skip if you want to lose weight.

A 1-cup serving of this creamy dish can easily weigh in at 600 calories (or more). For a  much lighter (and easy-to-make) alternative, try this recipe for wild mushroom risotto.

The bread may be in crumbs, but that doesn't make it low-calorie. A 1/3-cup serving of breadcrumbs has about 110 calories, which means if you decide to bread your dish, you'll need to add an extra 100-150 calories to it (depending on your serving size), and much more if it's breaded and fried.

At about 27 calories per small slice, adding the word "pepperoni" to your pizza order is an easy way to add a ton of extra calories (to an already high-calorie meal). To cut back on more than 100 calories per slice, top your pie with veggies instead.

Air-popped popcorn can be a low-calorie snack, but when you add butter, not so much. One small bag of popcorn at the movie theater could be loaded with up to 630 calories and 50 grams of fat. If you want to keep the calorie count low, your best bet is to pop your own at home and sneak it into the theater or buy a kid's size from the concession stand (and still share it).

Don't be fooled—even though most are fat-free, many pretzels can contain more than 200 calories per serving (and for very little nutrition). With pretzels and other high-calorie foods, dishing out a single serving and then putting away the bag can make you less tempted to eat more.

While some non-dairy ice cream alternatives can be lighter than the real deal, not all of them are—so be sure to check the label of your favorite brand. Some popular brands like Tofutti Vanilla dish out 210 calories and 13 grams of fat per 1/2 cup, while a 1/2-cup serving of vanilla ice cream comes in at 145 calories and 7.9 grams of fat. (Check out which healthy ice cream brands the Shape editors swear by.)

Smoothies can make the perfect healthy meal or snack. If you're used to making your own, you might be surprised by how high in calories they can be when you're ordering on the go. Some smoothie chains blend in 400 calories (or more) per 20-ounce cup.

While liver is packed with protein and zinc, it's also full of calories and cholesterol. The average single serving has 516 calories and 1,124 mg of cholesterol. If you can't live without liver but want to keep your dinner calories in check, enjoy this meal in moderation. Otherwise, c