Either, but I really like blueberry.
I prefer fruit muffins. My favorite is cranberry orange. :)
I like the flavor blueberries add to the muffin, but not the berry itself.
If anyone wants the recipe:
Dry: 1 cup flour, 1 tbsp cornstarch, 1 tsp baking powder. Add either blueberries or chocolate chips. Set aside.
Wet: 1 egg, 1/4 cup coconut oil, 1/2 cup vanilla Greek yogurt, 1 tbsp vanilla extract. Mix well, add 1/2 cup
Of sugar. Blend the sugar and the wet ingredients well.
Add the "wet" to the "dry". I usually have to grease and flour my nonstick cupcake tins b/c these stick. Bake at 350 for 27 mins. I add a streusel too.
Streusel: 1 1/2 tbsp butter, 1 tsp honey,
1/2 tsp vanilla extract. 1/3 cups of flour, 4 tbs sugar. Mic together the dry ingredients and the wet ingredients separately, then mix the two together. Should have a wet-sand texture. Sprinkle on top.