Author: Robcsa, hobby cook. I have not completed any culinary training, but I experiment in the kitchen at home to the delight (and sometimes dismay) of my family.

If you’re craving a moist, quick autumn dessert this weekend, this incredibly moist pear and walnut mug cake is sure to hit the spot. You don’t need a scale, just a standard 250 ml mug, and the batter can go straight into the baking pan. The secret lies in the grated fruit and thick Greek yogurt, which keeps the cake soft for days.

I’m not a professional pastry chef, but I’ve learned this over the years: the best recipes are always the ones that don’t require washing ten bowls afterward. I whipped up this version one autumn afternoon when a few pears in the pantry had become too soft. I didn’t want to throw them away, and the walnuts were readily available from the garden. On my first attempt, I slightly overbaked the edges, but since I’ve started using less oil and a bit of yogurt, this has become our absolute favorite mixed cake.

The process is straightforward: mix the dry and wet ingredients separately, quickly combine them with the pear, and let the oven do the rest.

Why does this pear and walnut mug cake recipe work?

• Don’t squeeze out the pear juice: When you leave the juice in the fruit after grating, it combines with the flour and walnuts during baking, preventing the batter from drying out.
• Greek yogurt instead of extra oil: I used to add half a mug of oil to mixed cakes, but the result was heavy. The yogurt keeps the cake light, while still retaining moisture.
• Baking soda and baking powder together: The acidic environment of the yogurt activates the baking soda immediately. This helps the denser, walnut batter rise beautifully and become airy.
• Coarsely grated fruit: If you use a fine grater, it will turn into mush. However, using a coarse grater keeps the pear chunks intact, which are nice to bite into.

Tools

• 1 x 250 ml mug for measuring ingredients
• Large-hole hand grater (for the pear)
• 2 mixing bowls (one for dry ingredients, one for wet)
• Hand whisk (a regular fork works for the eggs)
• Spatula or wooden spoon for mixing
• Baking pan (approximately 20×30 cm) and baking paper

Common Mistakes

• Squeezing out the pear juice: I made this mistake at first because I was afraid the batter would get soggy. Don’t do it! If you squeeze it out, the result will be dense and dry. The recipe is designed to include the fruit juice.
• Overmixing the batter: If you beat it with a mixer for minutes after combining, the gluten in the flour will make the cake chewy and heavy. Use a spatula and mix gently, just until the ingredients are combined.
• Cutting too early: When hot, this cake is so soft that if you cut into it immediately, it will fall apart on the plate. Wait until it cools to warm or cold; this is when the walnuts and batter will firm up properly.

Pro Tips for Moist Pear Cake:

• Toast the walnuts: If you have an extra 5 minutes, toss the walnuts in a dry skillet before grinding until you can smell their aroma. This will deepen and intensify the flavor of the cake.
• Working with firmer pears? If the pear isn’t completely soft, let it sit in the bowl for 5 minutes after grating, sprinkled with a teaspoon of sugar, to help release its moisture.
• Securing the baking paper: Grease the corners of the pan with a drop of oil or butter before pressing in the baking paper. It won’t slide around when you scoop in the thick batter.

How to Variate This Simple Mixed Cake:

• Mug Carrot Cake: Replace the pear with 2 mugs of finely grated carrot, keeping the ground walnuts, plus the zest of one orange in the batter.
• Cocoa Cherry Variation: Instead of ground walnuts, use 1/2 mug of Dutch cocoa powder + 1/2 mug of flour, and replace the grated pear with 1.5 mugs of well-drained cherries folded into the batter.

Cooling and Storage

Cooling: It rarely lasts until the third day at our house, but if there are leftovers, store them in an airtight plastic container in the fridge. It will keep for about 4-5 days, and thanks to the yogurt, it won’t dry out at all, and in fact, it has a particularly pleasant texture when cold.

Storing the simple mixed cake: At room temperature, covered with a clean kitchen towel, it will stay fine on the countertop for 2 days. If you want to freeze it, slice it and layer it with baking paper in a freezer bag. It can last in the freezer for up to 2 months. After thawing, it may be slightly softer due to the pear, but it won’t lose any flavor.

How to Reheat the Pear and Walnut Mug Cake:

• In the oven: If you want to bring back that freshly baked feeling, place the slices in a preheated oven at 160°C for 5–7 minutes. It won’t dry out, and the edges will become deliciously crispy again.
• In the microwave: I only recommend this if you’re in a hurry. Heat on medium power (500 W) for 15-20 seconds. If you leave it in longer, the batter may become rubbery.
• Enjoying it cold: I think it doesn’t even need reheating; it’s fantastic served cold alongside a cup of coffee or tea.

FAQ

What type of pear is best for the walnut mug cake recipe? Any ripe, juicy variety is good (for example, Williams or Bosc). The key is that it shouldn’t be rock-hard but easy to grate.

Can I substitute Greek yogurt with plain natural yogurt or sour cream? Yes. 20% sour cream works perfectly as a substitute. Plain natural yogurt is a bit thinner, so use 1-2 tablespoons less, or the batter will be too soft.

I didn’t like walnuts in my youth; can I use something else? Absolutely. You can use ground almonds or hazelnuts in the same proportions.

What should I do if the pear juice is too watery after grating? Nothing, don’t pour it out! The ground walnuts and flour will absorb this moisture during baking.

Summary

For us, this simple pear and walnut mug cake is a real lifesaver when the family suddenly craves something homemade, but I don’t feel like spending hours in the kitchen. You don’t need a pastry diploma, just a bowl and a fork, and the result speaks for itself. If you have a few overripe pears at home, don’t let them go to waste; whip this up this afternoon!

For more simple mixed cakes and fantastic treats, check out here.

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