Preheat your oven to 350 degrees and line a muffin tray with paper liners. Set aside.
Place the chocolate and the butter in a microwave-safe bowl and heat in 10-second bursts until the chocolate has melted. Gently stir in between each burst to combine the chocolate and butter as they’re melting.
Once the chocolate has melted, whisk in the sugar, eggs, vanilla, and sour cream. Set aside.
In a large bowl, combine the flour, cocoa, baking soda, instant coffee, and salt. Fold the wet ingredients into the dry ingredients and stir until there isn’t any flour left at the bottom of the bowl (the batter will be thick).
Stir in the chocolate chips and divide the muffins between the muffin wells.
Bake the muffins for 20-23 minutes, or until a toothpick inserted in the center of the muffin comes out clean. Let the muffins cool in the pan for 5 minutes, then transfer them to a wire rack to finish cooling.
Notes
Recommended low FODMAP serving – 1 muffin per sitting