Preheat your oven to 375°F (190°C) and line an 8x8 square pan with parchment paper.
In a food processor, combine flour, sugar, salt, and spice powder with cold cubed butter. Pulse until crumbly. Divide into two bowls, keeping one for the topping in the fridge.
Mix 2 tbsp of milk into the crumble for the base, then press it firmly into the baking pan. Bake for 10 minutes until lightly golden. Let cool for 5 minutes.
In a bowl, toss apricot cubes with sugar, lemon juice, and cornstarch until coated.
Pour the apricot mixture over the baked base and sprinkle the crumble topping generously on top.
Bake for 35-40 minutes until the filling is set and edges are golden. Cool completely in the pan on a wire rack.
Cut into squares and enjoy!