Do protein shakes have as much protein as beef or chicken?

“Protein shakes can range from 100% protein to mostly carbohydrates with a little added protein and fat.” Source

Sources of protein in most shakes:

Milk
Whey
Casein
Egg
Soy
Rice

Hamburger patty, 4 oz – 28 grams protein
Steak, 6 oz – 42 grams
Chicken breast, 3.5 oz – 30 grams protein

You might also consider hemp seeds, yogurt and avocados.

scoop of whey – 20 grams
cup of yogurt – 10 grams
avocado – 2 grams
egg – 6 grams

Then you can add some frozen spinach, a frozen banana and some frozen berries.

Someone gave me some 8 oz, 237ml bottles of vanilla flavored Ensure Plus . (They were outdated and were going to be thrown away. And since I have a reputation for not wasting “food”...)

The 8 oz bottle contains 13 grams of protein, 350 calories, and about 25%-40% of the daily values for most vitamins and minerals.
You can compare that with the info @gailcalled posted above.

Look at the labels.

Beware that if you watch your cholesterol some of the protein shakes are high in cholesterol and I think a lot of people don’t anticipate that.