Preheat oven to 350°F. Lightly grease and flour an 8-inch round deep cake pan.
Beat together butter and sugar until light and fluffy. Add orange zest, half the orange juice, eggs, ground almonds and orange extract. Sift in corn meal and baking powder; stir until evenly mixed. Spoon batter into prepared pan and bake for 35-40 minutes, or until just firm to the touch and golden brown. Cool in the pan for 20 minutes.
Turn cake out onto a wire rack and cool completely.
For topping: Place remaining orange juice and marmalade in a microwave-proof bowl. Heat on high for 20-30 seconds; stir and pour over cooled cake. Cut into wedges to serve.











