1. Preheat the oven to 180°C, (160°C for fan ovens), Gas Mark 4.
2. Put the cake ingredients in a bowl and beat (use an electric hand mixer if you have one!) until light and creamy.
3. Spoon the mixture into a 20cm (8in) square cake tin, lined with baking parchment and spread out. Bake for about 30-35 minutes until springy and cooked in the centre. Cool slightly then lift out onto a cake rack.
4. When cool, make the chocolate glaze. Break the chocolate into pieces and place in a bowl with the evaporated milk. Melt gently in the microwave then stir in the butter. Set aside at room temperature for 10-15 minutes to thicken up before spreading over the cake. Top with the chocolate, candles and decorations!
TIP: Look out for other fun ways to decorate your cake – try edible glitter, sugar shapes or sprinkles!
Recipe courtesy of Carnation