In a medium bowl combine flour, baking powder, and salt. Set aside.
Combine dry ingredients
In a large bowl combine sugar and lemon zest for 3-4 minutes- this helps infuse the sugar with a stronger depth of lemon flavor.
Infuse sugar with lemon zest
Add the butter and mix for 3-4 minutes, so it's nice and fluffy. Then add the oil and combine.
Add the butter
Next, add the eggs one at a time.
Add the eggs
Mix in lemon juice then add the Greek yogurt, mix to combine.
Add the remaining wet ingredients
Gently fold in the dry mixture.
Swirl lemon curd into the batter in layers. Then bake the loaf cake.
Add lemon curd
Combine powdered sugar, lemon juice, lemon zest and, heavy cream. Drizzle on top of the cake when it is completely cool.
Make the glaze
Slice and Enjoy!