Add 2 inches of water to a medium saucepan and bring to a rolling simmer over medium-high heat. Then reduce heat to medium and set a medium glass or ceramic mixing bowl on top, making sure it's not touching the water (this creates a "double boiler").
To the mixing bowl, add finely chopped cocoa butter and coconut oil and let melt, stirring occasionally with a wooden spoon or whisk - about 2-3 minutes.
Once melted, carefully remove bowl from heat (turn off stove top) and add the maple syrup and cacao or cocoa powder. Use a whisk or wooden spoon to mix until fluid and thoroughly combined.
Taste and adjust flavor as needed. I added about 2 Tablespoons maple syrup total (amount as original recipe is written // adjust if altering batch size), but it’s completely up to how sweet you prefer your chocolate.
Because the chocolate is quite thin at this point, set in the refrigerator to chill and slightly thicken and make dipping the dates easier - about 15-20 minutes total, removing to stir/whisk occasionally. You'll know it's ready when it's more like pourable hot fudge than melted coconut oil.
Next, carefully remove pits from dates and be careful to keep one side of the date intact, as opposed to splitting it into two separate pieces. You're trying to create a small crevice in the date (see photo) so it's easy to add/contain the tahini. Once pitted, fill with tahini - about 1/2 - 1 tsp depending on size of date.
Add dates to a parchment-lined baking sheet and pop in freezer to chill while chocolate thickens.
Once chocolate has thickened (if it got too thick, briefly microwave or set back over the double boiler to thin), add one date at a time and flip with a slotted spoon or fork to fully coat, then tap off any excess chocolate. Set back on the parchment baking sheet and immediately sprinkle with a little sea salt and either sesame seeds or coconut. Repeat until all dates are coated.
Enjoy immediately. Store leftovers in the refrigerator for 1 week or the freezer for 1 month. Let come to room temperature before enjoying for best flavor/texture.
*If you don’t have cocoa butter, simply sub all of the ingredients for 1 1/4 cup (150 g) chopped dark vegan chocolate + 1 Tbsp (15 g) coconut oil (amount as original recipe is written // adjust if altering batch size) and melt in the microwave in 30 second increments or over a double boiler on the stovetop. No need to refrigerate - it will already be thick enough for dipping as is. *Nutrition information is a rough estimate calculated using all of the tahini and chocolate.