2/3 cup all-purpose flour
Dash of salt
3 Tablespoons light brown sugar
5 Tablespoons sugar
And so on.
Step one. To make homemade lemon curd, in a sauce pan melt the butter. Remove from the heat, add sugar, lemon juice and lemon zest, whisk to combine. Add eggs and whisk well. Place over medium heat and cook for 5-6 minutes until all sugar dissolve and the mixture is thick enough to hold the marks from a whisk. Cool completely.
Step 2, Preheat the oven to 350 F. Line 8 x 8 x 2 inch square baking pan (or 9 x 9 inch pan) with parchment paper leaving an overhang the sides, spray with non-stick spray and set aside.
After it, First make the crumb topping. In a bowl stir together flour, sugar, brown sugar and salt. Then add melted butter and stir with a fork until pea size crumb form. Set in the fridge until ready to use.