Preheat the oven 350-degrees. In a large pan over medium heat, toast the almonds. Stir the almonds around until lightly golden. After the almonds have cooled, grind them in a food processor until fine.
Cream together the butter and sugar in a large bowl until light and fluffy. Add the egg, milk, and almond extract until smooth. Stir in the ground almonds. Sift the dry ingredients into the bowl and mix to combine.
Spray a mini bundt pan with baking spray and fill each well two-thirds of the way full. Bake 18-22 minutes until a tester comes out clean. Allow the cake to cool in the pan – then invert onto a wire rack.