01 -
Whisk together egg yolks, sugar, lemon zest, and lemon juice in a double boiler over simmering water. Stir continuously until thickened, about 10 minutes. Remove from heat, add cold cubed butter, and whisk until smooth. Transfer to a container and cover with plastic wrap to prevent skin formation. Chill until set.
02 -
Preheat oven to 350°F. Line a 12-cup muffin pan with paper liners.
03 -
In a bowl, combine all-purpose flour, baking powder, baking soda, and salt. Set aside.
04 -
Beat softened butter until smooth, then gradually add sugar and continue creaming until light and fluffy.
05 -
Add eggs one at a time, beating well between additions. Mix in vanilla extract, lemon zest, Greek yogurt, and lemon juice until just combined.
06 -
Gently fold in the dry ingredients until just incorporated to avoid overmixing.
07 -
Spoon batter into muffin cups to fill halfway. Add a tablespoon of lemon curd in the center of each, then cover with remaining batter.
08 -
Mix flour, granulated sugar, brown sugar, and melted butter until crumbly. Sprinkle the streusel evenly on top of each filled muffin cup and gently press to adhere.
09 -
Bake for 25 minutes or until muffins are set and golden brown. Remove from oven and let cool.
10 -
Whisk powdered sugar with milk or cream until smooth. Drizzle over cooled muffins before serving.