Making Maple Syrup: A Guide for Beginners

This guide is for the hobbyist.

Our second maple syrup season has come to a close here in northern Wisconsin and it was a success! Twenty-two pints of fresh Wisconsin syrup currently sit in our fridge, ready to be devoured.

The process of making maple syrup from scratch takes time and effort and, depending on the amount you collect, requires a couple weeks commitment. But it’s also one of the most rewarding activities once it’s all said and done. To know that you collected sap straight out of a maple tree and diligently transformed it into sugary, sweet syrup is truly an impressive feat. It’s also the perfect way to spend time outdoors and enjoy the season of spring.

So, without further ado, here is my guide to making your very own maple syrup!

Tapping

The best time to start tapping maple trees is when temperatures climb above freezing during the day and drop below freezing during the night. This is why March and April are the classic maple syrup making months here in Wisconsin!

Step 1 | supplies

Here are the supplies you’ll need at this stage: flexible tailor tape measure, flagging tape, power drill, 5/16th drill bit, hammer, spiles (aka taps), and containers for collecting.

This year, we used these CDL blue sap bags to collect the sap and these CDL sap sak holders which hang off of the spiles.

Step 2 | identify your maples – fall

We determined that the easiest time to find and identify maple trees is in autumn. You can see an illustration of a maple leaf below for reference.

Step 3 | measure the tree – fall

Once you find a maple tree, the next step it to measure the trunk. You’ll want to avoid tapping trees under 10 inches in diameter. Anything under this, and you’ll risk damaging or killing the tree.

Step 4 | mark it – fall

Now that you’ve found a big enough maple tree, tie some flagging tape around it so that it’s easy to find again once spring rolls around. Flagging tape can be found on Amazon for pretty cheap.

Step 5 | watch the weather – spring

As mentioned above, look for days when the temperatures reach into the upper 30s or 40s and then drop below freezing at night. This is when the sap flows best and when you should start tapping the trees.

Step 5 | Tap the tree – spring

Pick a spot on the south side of the tree about three feet off the ground. Drill a hole about 2-2.5 inches deep at a slight upward angle so that the sap flows downward. Gently hammer the spile into the hole. Sap should start dripping out right away! Hang your containers and start collecting!

Collecting

Here are some frequently asked questions when it comes to collecting sap!

How often do you collect it?

Our bags hold up to four gallons so we collected every couple of days.

Can I freeze sap?

Yes, you can! We’ll freeze it if we’re not planning on boiling it right away.

Can I refrigerate sap?

Yes, but there are a few things to know: sap should be refrigerated at a temperature of 38 degrees F or lower and used within 7 days of collection.

How did you haul it?

We poured the sap out of the bags and into 5-gallon, food-grade buckets. Then, we’d bring the buckets back home on a sled and cover them in snow until we were ready to boil (we didn’t have enough room to store it all in our freezer).

How long does maple syrup season last?

On average, 4-6 weeks.

How much sap should I collect?

It’s totally up to you but keep in mind – it takes approximately 40 gallons of sap to produce 1 gallon of maple syrup. This year we collected around 110 gallons of sap and got 22 pints of syrup!

Boiling 

Since sap is mostly water, you need to boil it down to turn it into syrup.

Step 1 | supplies

Here are the supplies you’ll need at this stage: evaporator, pans, firewood, oven mitts, measuring cup or something to transfer small amounts of sap from the pan to the hydrometer cup, hydrometer, hydrometer cup, kitchen thermometer.

Step 2 | get your evaporator ready

Simply put, a maple syrup evaporator is an open pan over a heat source. This lets the steam escape which allows the sap to boil down, making it more and more concentrated.

Since this guide is for the hobbyist, we’ll be keeping it simple. The easiest and cheapest way to boil sap is over an open fire. However, if you want to take it a step further, consider building an evaporator like we did for a little over $100! You can read that blog post here.

Step 3 | boil, boil, and then boil some more

It takes quite a while to boil down sap so I would highly suggest doing as much as you can outdoors. As it starts getting low, just add more sap and keep going. Don’t let it get too low since this can burn it. We probably spend a total of 3-4 days boiling outside.

Step 4 | finish it up inside

With the 40 to 1 ratio in mind, you’ll want to bring the sap inside once you start nearing that point.

So for example, if you started with 40 gallons of sap, bring it inside once you’ve boiled it down to about 2 gallons. You can then boil off the remaining gallon on your stove. 

Step 5 | keep an eye on it

As it gets close to being done, it has a tendency to boil over the pot. Watch it closely!

Step 6 | Test it with the hydrometer

Sap becomes maple syrup when it reaches a certain density. This is where the hydrometer and the thermometer come into play. The hydrometer I’ve linked is the same one that we use and comes with detailed instructions that explain how you test your maple syrup to see if it’s done. It talks about temperature, density (Baumé), and barometric pressure. It’s a bit too technical and lengthy for me to explain in this guide so I would suggest reading the instructions provided by the hydrometer.

Filtering + Canning

The last and final step!

Step 1 | Supplies

Here are the supplies you’ll need: mason jars (we use pints), pot, measuring cup, pre-filters, filter bag, something to hang the filter bag on.

Step 2 | filter while hot

It’s important to filter your syrup right away when it’s hot so that it flows easier through your filters.

Step 3 | our filtering system

Sean built a stand using 2×4’s in order to suspend this Orlon filter bag above a pot. We also layered a few pre-filters inside of the main filter bag.

Pre-filters are thinner than the Orlon filter bag and allow you to remove them one by one if they get clogged. They can be found in-store at Fleet Farm (for some reason, they’re not listed online).

Step 4 | pour into mason jars

We used Ball pint mason jars. The heat from the syrup should seal the lids.

Step 5 | Enjoy!

You’re finally done! Keep your syrup refrigerated and start making those pancakes!

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