Diet Chocolate-flavored Syrup

Combine firmly packed cocoa powder, sugar substitute, and salt in a medium saucepan, whisking together until no lumps remain.

Gradually add cold water to the cocoa mixture while whisking constantly to create a smooth, lump-free slurry.

Place the saucepan over medium heat and bring the mixture to a gentle simmer, stirring occasionally.

Remove from heat and let cool for 1-2 minutes until the mixture reaches room temperature.

Stir in pure vanilla extract and chocolate extract until fully incorporated.

Transfer the syrup to a glass jar or storage container and refrigerate until ready to serve; adjust sweetness to taste preference if needed.