Homemade Chocolate Syrup

My son loves to have chocolate milk as a special treat. I used to buy the big brand name ones at the grocery store and I realized that the ingredient list is fairly long and I'm not 100% sure about the allergy info. With a child who has severe allergies to peanuts and tree nuts, one can never be too careful.
I decided to try making my own chocolate syrup. It's amazingly easy! I looked at a few recipes online and came up with an option that can be used in hot or cold milk or poured over ice cream.

I happened to have all of the ingredients already in my pantry as well.

1 C. Unsweetened Organic Cocoa Powder
1 C. granulated sugar
1 C. cold water
1/2 teasp. Kosher salt
1 Tbs. vanilla extract

Whisk cocoa and sugar in a medium saucepan. Add water and half the salt. Whisk over med heat until boiling, stirring constantly. Thickens in about 3 min. Taste and rest of salt, if desired, remove from heat, add vanilla and let cool. Will keep for about a month in an airtight container in the fridge.

Here is an older choice and the new jar of homemade chocolate.