Line your pan: Use an 8x8-inch square pan or a loaf pan for thicker pieces.
Line with parchment paper, letting it hang over the sides for easy lifting.
Melt the base: In a heatproof bowl, add dark chocolate and coconut oil. Microwave in 20–30 second bursts, stirring between each, until smooth. Or melt over a double boiler on the stovetop.
Stir in almond butter: Add the almond butter while the chocolate is warm.
Stir until completely blended and glossy.
Sweeten and flavor: Mix in maple syrup (or honey), vanilla extract, salt, and cocoa powder if using. Taste and adjust sweetness and salt.
Add texture (optional): Fold in a handful of chopped almonds or other mix-ins. Keep it modest so the fudge sets evenly.
Pour and smooth: Scrape the mixture into the lined pan.
Smooth the top with a spatula. Sprinkle flaky sea salt if you like.
Chill to set: Refrigerate for 1.5 to 2 hours, or freeze for about 30–40 minutes, until firm enough to slice.
Slice and serve: Lift out using the parchment. Use a warm, sharp knife for clean cuts.
Cut into small squares—this fudge is rich.