Prep the pan and oven: Preheat to 350°F (175°C). Line an 8x8-inch pan with parchment, leaving overhang for easy lifting.
Make the crust: In a bowl, whisk almond flour, shredded coconut, sweetener, and salt.
Stir in melted butter, vanilla, and the egg until a moist crumb forms.
Press and par-bake: Press the crust evenly into the lined pan. Dock lightly with a fork. Bake 10–12 minutes until set and just starting to color at the edges.
Cook the raspberry layer: In a small saucepan over medium heat, combine raspberries, sweetener, lemon juice, and zest.
Simmer 3–5 minutes, mashing gently until juicy.
Thicken with chia: Remove from heat and stir in chia seeds. Let sit 5 minutes; it will thicken into a spoonable jam. Taste and adjust sweetness.
Mix the coconut topping: In a bowl, combine shredded coconut, sweetener, melted butter, vanilla, and a pinch of salt.
It should look like loose, moist flakes.
Assemble: Spread the raspberry layer evenly over the warm crust. Sprinkle the coconut topping in an even layer, lightly pressing so it adheres.
Bake: Return to the oven for 15–18 minutes, until the coconut is lightly golden and the edges are set.
Cool and set: Cool completely in the pan. For the cleanest cuts, chill 1–2 hours before slicing into 16 squares.
Serve: Enjoy chilled or at room temperature.
The flavor develops even more by the next day.