Cheesy Spinach Squares

The title of this recipe may not be particularly compelling, but these little squares are absolutely addictive. If you don’t believe me, just ask our birthday girl, Harlowe. This is her absolute FAVOURITE food, the food to rule all foods, the food to which no other food can possibly compare in her one year old mind, and since I will be whipping up a double or triple batch for her first birthday party this weekend, I figured that it was nigh time to share the recipe.

Cheesy Spinach Squares

It was at a friend’s baby shower, about four years ago, when I first had a similar spinach square. The hostess announced with pride that her signature appetizer was about to come out of the oven, and half the people in the room started to froth with anticipation. Naturally, I was curious. And hungry. With pomp and a flourish, she lay a large tray of her cheesy spinach squares on the table and I was…underwhelmed. Spinach squares are not the most attractive looking appetizer, and there were A LOT of them; far more than the 20 or so of us could possibly be expected to eat. The best that I could think of to say was, “Those sure do look….green.”

Then I tasted one.

Let me tell you, this girl knew from spinach squares. I ate about half a dozen and would have gone back for more if dignity hadn’t prevailed. Our pack of party goers managed to polish off the entire tray before the last onesie was unwrapped.

Before I left, I cornered the hostess and tried to wheedle the recipe out of her. The original recipe had come from a magazine (Canadian Living? Today’s Parent? Even she couldn’t remember) but she had made these squares so many times that she was just going by rote. She did her best to share the knowledge, but all that I remembered when I left was, “You take frozen spinach and finely chopped onion and then you beat some eggs…you add flour and milk and then about a pound of cheese…bake it until it’s browned.”

I filed these truncated instructions somewhere in the back of my brain, always meaning to take a stab at the spinach squares but never getting around to it. Then, about a month ago, I was trolling through my fridge looking for ingredients that I could use to cobble together an appetizer spread for some girlfriends that were stopping by after work. I had thawed spinach (from a casserole that I had every intention of making…but didn’t) and plenty of eggs (because I kept thinking that we needed them…but we didn’t). As you can imagine, I always have cheese. Hence, cheesy spinach squares.
My girlfriends and I enjoyed the squares, but not as much as my baby did. I realized that it was a great way to get her to eat her greens while still getting a healthy dose of protein in the mix. In the last month, I have made these squares EASILY 4 or 5 times. I have used whatever cheese ends I have hanging around in the fridge, and I can tell you with confidence that these taste equally delicious when they’re made with a combination of Havarti and Manchego, Gruyere and Swiss, or even the time that I was desperate and used a smoked blue cheese and Mozzarella. Still good.
At a barbecue a couple weeks ago, I was feeding Harlowe her packed lunch (which included a spinach square), when the purveyor of those original spinach squares showed up with….HER FAMOUS SPINACH SQUARES! As she re-heated them in the oven I was dancing from one foot to the next, waiting in eager anticipation. When I tasted hers again for the first time in years, they were just as delicious as I remembered, and a little bit different from this recipe. Hers have more cheese and less egg than mine do, and the chopped onion really does add a lot of flavour, so feel free to play with this recipe as you see fit. I might add a little bit of onion myself next time because I don’t think Harlowe will mind. She also serves hers hot, which is a great idea because these reheat so well. That said, they are just as delicious at room temperature and, frankly, the baby and I don’t mind when they’re straight from the fridge.
Cheesy Spinach Squares

Cheesy Spinach Squares

Makes appx 1 dozen *

  • 3 eggs
  • 1 small clove garlic (or 1/2 large clove)
  • 1 tbsp dried dill
  • 1/3 cup milk
  • 1/4 cup flour
  • 100 g old cheddar (appx 1 cup grated) **
  • 50 g Asiago (appx 1/2 cup grated) **
  • 1 package frozen chopped spinach
  • 1/4 cup finely minced onion, optional
  • salt, to taste

* I frequently double the recipe and instead of making a flatter square in a loaf pan, I make a fatter square in an 8×8 square baking pan. If you do this, increase your cooking time by about 10 minutes.

Cheesy Spinach Squares

Preheat your oven to 350ºF. Generously butter about halfway up the sides of a loaf pan.

Crack your eggs into a medium to large mixing bowl. Use a garlic press or a grate to puree the garlic before adding it to the eggs along with the dried dill. Pour in the milk before whisking to combine.

Cheesy Spinach Squares

Add the flour to the wet ingredients and whisk ONLY until the flour is mostly incorporated. It will still be a bit lumpy, but that’s totally fine.

Cheesy Spinach Squares

Grate the cheese and add it to the bowl.

Squeeze as much water out of that spinach as you possibly can. Really wring it dry. Add the spinach to the cheese and egg mixture, and mix with a spoon (or, let’s be honest, a clean hand is far more efficient) until everything is well dispersed. Add a heavy pinch of salt (around 1/2 tsp should do you well) if you’re making this for adults. However, I don’t add any salt when I make this for the wee ones, and considering how much salt is in cheese I find that they are usually seasoned (lightly, but adequately) without needing much more.

Cheesy Spinach Squares

Scrape the mixture into your buttered baking dish and smooth out the top.

Cheesy Spinach Squares

And here is where you will see some inconsistency in the photos, because I stopped taking pictures of the batch in the loaf pan and continued on with my photos when I made a double batch a few days later. I wasn’t kidding when I said that I make these all the time.

Cheesy Spinach Squares

Bake in the centre of your oven for approximately 30-35 minutes (longer if you double the batch), or until the top is golden, the edges are browned, and the mixture has pulled away from the sides. You don’t want to undercook the squares or they will be surprisingly difficult to unmould, buttered pan be damned.

Cheesy Spinach Squares

Let the cheesy spinach squares cool completely in the pan before unmoulding (put a plate or flat chopping board on top of the pan and then quickly turn it over. If you don’t feel the mass fall out right away, give the base a few quick raps) and cutting it up into squares of whatever size you choose.

When I make these as an appetizer or cocktail nibble, I prefer to use a larger pan so that the squares are thinner and I can cut them up into bite sized little rectangles. Harlowe, on the other hand, likes a big, thick square that she can hold in her first and really sink her teeth into. Sometimes we compromise, but mostly she just wins.

Cheesy Spinach Squares

Cheesy but still packed full of greens, this is the kind of cocktail food that I don’t feel guilty for eating, and it is just as perfect for small hands and hungry mouths. And hey, we play with the recipe all the time in terms of the type of cheese, or maybe adding some chopped fresh basil instead of the dill, and so on. Feel free to take this as your jumping off point and make it your own. I hope you love these squares as much as we do!

Cheesy Spinach Squares

Cheesy Spinach Squares
  • Amanda

    I’m so happy! The original squares are straight out my mother’s kitchen. You seem to have tweaked the recipe quite nicely :-)

  • Tara

    How big (weight wise) is a package of frozen spinach? Enquiring minds (from overseas!) with small children would like to know :)!

    • choosybeggarmike

      From what I remember of buying them yesterday, the packages we use are 300 grams.

  • attica

    I made these yesterday (1/2 an onion added, no extra salt). OMG Om nom nom! I particularly love how strong the cheese flavor comes through. Into rotation it goes!

  • CAL

    This recipe was a bit of trial and error for me as I had to convert the USA cups to grams etc. FYI the changes were:-
    150 grams cheddar cheese
    60 ml milk
    75 grams flour
    75g onion
    Obviously I have no idea how mine differ in taste from the originals but suffice it to say that I have found it difficult to stop cutting myself a cube of this savoury treat each time I pass it on the kitchen table. By tomorrow it will be loooong gone.
    Thanks for posting this recipe, I now need to try out more from this website.

  • emaxtastic

    I add an extra egg, and used 50g smoked cheddar, 50g old cheddar, and 50g asiago! This is the third time I’ve made it for a dinner party with friends – after the first time I’m *pretty much* not allowed to come if I don’t bring them lol