Step 1

Preheat oven to 350F (175C). Lightly spray an 8-inch round or square baking pan with nonstick cooking spray.

Step 2

In a large bowl, whisk together the almond flour, potato starch, coconut sugar, flaxseed meal, baking powder and (optional) salt.

Step 3

Measure the water and add the vanilla to it. Pour into bowl with almond flour mixture and whisk until blended and smooth. Spread into prepared baking pan.

Step 4

Bake in the preheated oven for 35 to 40 minutes until golden brown and a toothpick inserted near the center of the cake comes out with only moist crumbs attached.

Step 5

Transfer cake to a cooling rack and cool completely in pan. Run a butter knife around edge of pan and invert cake on a plate. Turn right side up on  cake plate.

Step 6

If desired, lightly dust with confectioners’ sugar just before serving.