Favourite Microwave Coffee Cake

This is a clever 1970s-era coffee cake that solves two problems at once: it cooks fast in the microwave so the inside stays soft and never overbakes, then gets a quick broil to brown the top into that signature cinnamon-sugar crust. Conventional ovens can’t match this combination of texture in 10 minutes total.

The creaming step still matters even though the cake won’t see traditional dry heat for most of its cook. Butter beaten with sugar until truly fluffy traps tiny air bubbles that expand in the microwave to give the cake its rise.

Alternating dry and wet additions, ending with flour, prevents the batter from breaking. Microwave cakes can turn rubbery if the gluten gets overworked or the batter splits, so use a light hand and stop mixing as soon as the flour disappears.

Use a non-metallic 8-inch pan rated for microwave use. Metal pans will spark and damage your microwave. A heatproof glass or ceramic pan works perfectly and lets you see the doneness from the side.

The broiler finish is what makes this look like a real coffee cake instead of a pale microwave-pale puck. Two to three minutes under high heat caramelizes the cinnamon sugar into a crackly amber crust.

Kitchen Tips

• Microwave wattages vary wildly. Start checking for doneness at 4 minutes if you have a high-power microwave (1100W+).
• A toothpick should come out clean or with a few moist crumbs. Wet batter means more time, dry crumbs mean overcooked.
• Watch the broil closely. Sugar burns in seconds at high heat. Stand at the oven and don’t walk away.
• Eat warm for the best texture. Microwave cakes go a little tough as they cool, so timing matters.

Variations

• Add ½ cup of fresh blueberries to the batter for a fruity version.
• Stir 1 teaspoon of vanilla extract into the milk before adding for deeper flavor.
• Top with a streusel of cold butter, flour and brown sugar instead of cinnamon sugar for a more substantial crunch.