Step 1

For the cake: Combine the milk, chia seeds, vanilla, egg yolk and banana in a small microwave-proof jar or container (I prefer half-pint Mason jars). Add the flour and baking powder and stir until well incorporated and the batter thickens. Store in the fridge until ready to serve.

Step 2

Microwave the jar on high for 1 to 1 1/2 minutes, then serve.

Step 3

For the peanut butter cake: To the cake recipe, add the peanut butter and 1/2 teaspoon cinnamon and give everything a good stir. Once the cake is microwaved, drizzle some honey and sprinkle more cinnamon, if desired.

Step 4

For the chocolate chip cake: To the basic recipe, add the chocolate chips and 1 tablespoon chopped walnuts. Once the cake is microwaved, top with the orange zest, more walnuts and honey, if using.

Step 5

For the fig oatmeal cake: Omit the flour in the cake recipe, and substitute with the oats. Add the figs and cinnamon. Once the cake is microwaved, add the almonds, coconut flakes and a drizzle of maple syrup, if using.