Butter cake - all mixed together

http://www.mariasmenu.com/cake/butter-cake

1. Butter – 125 gm, softened
2. Vanilla essence – 1 tsp
3. Caster sugar – 1 1/4 cups, (275 gm)
4. Eggs – 3, at room temp
5. Plain flour – 1 cup, (150 gm)
6. Self-raising flour – 1/2 cup, (75 gm)
7. Bicarbonate of soda – 1/4 tsp
8. Milk – 1/2 cup (125 ml) at room temp

Preheat oven to 180 C, 10 mins before baking. Grease a deep 20 cm/8 inch round cake tin; line base with baking paper. Beat ingredients in medium bowl on low speed with electric mixer until just combined. Beat on medium speed until mixture is smooth and changed to a paler colour. Pour mixture into prepared pan.
Bake cake in the preheated oven for 40-50 mins or until the skewer inserted comes out clean. Stand cake 5 minutes then turn onto wire rack; turn cake top-side up to cool. Dust cake with a little sifted icing sugar, if desired