Preheat the oven to 350F. Lightly oil cake form.
With an electrical mixer beat the softened butter, lemon zest, and sugar.
1 Tbsp lemon zest,, ½ cup unsalted butter,, 1 cup sugar
Add in the eggs. Beat for 1 minute, then add the Greek yogurt. Beat until smooth and pale. Then, turn mixer to the lowest speed.
3 large eggs, 1 cup Greek yogurt
Sift the dry ingredients together: flour, baking powder, and salt. Add to the mixing bowl.
2 cups all-purpose flour, 2 tsp baking powder, ¼ tsp salt
Incorporate the wet and dry mixtures together. Transfer into prepared cake form.
Bake for 40-45 minutes, or until inserted toothpick comes out clean. Cooldown completely.
Slice cake in half.
Make Lemon buttercream: Melt unsalted butter in a pan or microwave.
3 Tbsp unsalted butter
Mix together powdered sugar, melted butter, and lemon juice.
2 cups powdered sugar, 3 Tbsp unsalted butter, 1 lemon,
Spread on the top of the bottom slice of cake, and place the top half on top. Spread the rest of the cream all over the cake.
Decorate with lemon zest (optional).
lemon zest,