Small-batch Orange Muffins

INGREDIENTS

Citrus juicer

3/4 cup

+ 2 tablespoons (105g) all-purpose flour ( measured by weight or the spoon and sweep method*)

1 tsp

baking powder

1/8 tsp

salt

4 tbsp

unsalted butter (melted and slightly cooled)

1/4 cup

granulated sugar

1/4 cup

milk

2 tbsp

orange juice (*)

2 tbsp

sour cream

large egg white

1 1/2 tsp

orange zest (very lightly packed)

1/3 cup

powdered sugar (sifted if lumpy)

to 3 teaspoons orange juice

1/2 tsp

orange zest (very lightly packed)