Prepare the double boiler by filling it with water, and over medium heat, set it to simmer.
In a small saucepan over medium-high heat, mix in the heavy cream, butter, and vanilla and bring to a boil.
Once the cream mixture has reached a boil, remove the pan from the heat and let it sit for 5 minutes.
Using a chef's knife, roughly chop the dark chocolate bar.
Place the chocolate into the double boiler above simmering water, occasionally stirring with a spatula until completely melted.
Place parchment paper on the half sheet pan and set it aside.
Once the chocolate has melted, remove it from the stove and, using a spatula, mix in the cream mixture from the small saucepan you set aside earlier.
Add in the cinnamon and chipotle chili pepper and mix to combine.
Holding the strawberries by the greens at the top, dip the strawberries into the chocolate, swirling them around to coat the strawberry thoroughly. Lay the chocolate-covered strawberries on the parchment paper covered sheet pan.
Place the sheet pan with the chocolate-covered strawberries into the refrigerator for 30 minutes to set.Keep the chocolate-covered strawberries refrigerated to keep fresh. Consume within two days.