Trust me, your family will love these muffins and constantly ask for them.
Mix well and set aside.
Mix, then gradually add 1/2 of the dry mixture.
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After this, fold in the rest of the dry mixture.
Once done, reserve a little portion for later.
Grease your muffin pan with nonstick cooking spray, then divide the batter among the tin cups.
After this, divide the reserved batter on each top, then swirl using a bread knife.
Sprinkle the reserved chopped chocolate on top.
Place the muffin pan in the preheated oven for 20 minutes.
After baking, let the muffins rest for five minutes before removing from the pan.