Yes, I have a favorite chocolate syrup recipe. Glad you asked. Feel free to modify as you see fit :)

Chocolate Syrup

Ingredients
2 cups (16 oz) water
1 cup (200 g) white granulated sugar
1 cup (200 g) light brown sugar

1/2 cup (45 g) cocoa, sifted
1/2 cup (45 g) dutch cocoa, sifted

1/4 teaspoon kosher salt
2 tablespoons light corn syrup

1/8 tsp cinnamon
1/8 tsp nutmeg
1 Tbls vanilla

Preparation
Bring water and sugar to a boil, whisking until sugar is dissolved, at least 3 minutes.
Whisk in cocoa, salt, and corn syrup until all of the solids have dissolved.
Reduce sauce and simmer, whisking, until slightly thickened, at least 3 minutes.

Remove from heat and add cinnamon, nutmeg, and vanilla.
Strain and cool to room temperature (syrup will continue to thicken as it cools).

Makes: About 4 cups?