Preheat oven to 180 C or 350 F. Line a 8x4-inch loaf pan with baking paper. Set aside.
Sift flour and sugar into a large bowl. Set aside.
Place eggs, milk, oil and vanilla extract in a medium bowl. Whisk to combine.
Make a well in the center of the flour mixture. Pour in egg mixture.
Using a spatula, fold in gently to create smooth batter. Set aside.
Lay a row of evenly stacked Christmas trees in the loaf tin. Scoop the batter over the top to cover the trees.
Bake for 40 minutes or until a skewer inserted in the center comes out clean.
Allow to cool in the pan for about 10 minutes and then pop out onto a rack to cool completely.