Chop the chocolate into smaller pieces for easier melting.
In a small saucepan over medium heat, warm the heavy cream until it's just about to simmer, but don't let it boil.
Add the honey, chili flakes, cinnamon, and a pinch of salt to the warm cream. Stir well to combine.
Remove from the heat and pour the hot cream over the chopped chocolate. Let it sit for a minute, then stir until smooth and glossy.
Stir in the butter and grated orange zest until the sauce is completely smooth and shiny.
If desired, strain the sauce through a fine-mesh sieve for an ultra-silky texture.
Serve warm over ice cream, pancakes, or alongside cakes and desserts. Refrigerated sauce will thicken slightly but can be easily reheated.
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