Guava syrup has a honeylike texture and tastes heavenly. In my area we don't have guava trees so I love it when I find some at the store. I appreciate the flavor which to me tastes so exotic. This syrup is a byproduct of a guava jam that I make. The jam uses the outside of the fruit and the syrup uses the inside that surrounds the seeds.
Homemade Guava syrup is delightful to eat any time of the year.

Preparation to Make Guava syrup:
Start by preparing your boiling water bath canner with enough water to cover 5-half pint jars with 1-2 inches of water. Place the water bath canner on the stove on medium heat. Now that your equipment is ready, it is time to start making syrup.
Ingredients:
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23 guava fruit
1/2 teaspoon butter
3 1/4 cups sugar
2 cups water
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Making the Jam:
Wash, peel and cut off the ends of the guava with a peeler and paring knife. Then, cut them in half and use a melon baller to remove the seeds and pulp from the center. I like to use the outer portion for making guava jam but you could add it to your syrup if you wanted.

Place the pulp, cinnamon stick and water in a  large pot. Place the pan on the stove and bring it to a boil. The goal is to both soften up the pulp and disperse the cinnamon flavor. I press the pulp against the sides of the pan to help break it up a little. Once it comes to a boil, set the timer for 5 minutes. Continue to stir regularly.

Next, I use my honey strainer. I only want to use the coarse upper strainer portion. The lower part would be too fine. I like to use a silicone spatula to move the pulp back and forth over the strainer so that all the liquid and soft pulp portion can strain through. I press down to encourage the soft parts to pass through the strainer. This can take 5 minutes or more to get the moisture through it.

When done, be sure to knock the pulp off the bottom of the strainer into the pot as this can be quite a large amount.

I give the leftover seeds to my chickens but you could mix it with peanut butter and feed the wild birds instead.
Then I add the sugar. If you want to reduce foaming add 1/2 teaspoon of butter. This is an option step but I feel like it really helps.
Bring the mixture back to a boil.
Filling Jars and Canning:
Using a jar funnel, pour or ladle the syrup into clean, hot, half-pint-sized jars leaving 1/4 inch headspace.

Place the lids and rings on and process for 15 minutes in a boiling water bath canner at sea level or adjust for your elevation. After the timer is done, remove the lid, turn off the heat, and allow it to cool for 5 minutes.

Remove the jars from the water bath. Allow them to sit a heat-resistant surface on the counter for 24 hours then check if they are sealed properly. The center will be indented down if they are. Then, remove the rings and wash off the jars with hot soapy water. If not sealed, place any unsealed jars in the refrigerator and use them right away.

Place the sealed jars in a cool, dry area and use them within the next 3 years. After that, the nutritional value begins to decrease.
If you have any questions about how to use a boiling water canner take a look at my canning basics posts.