Donut Loaves
Chocolate Peanut Butter Cup Donut Loaf
A soft donut loaf filled with chopped chocolate, topped with peanut butter cup streusel, melted peanut butter cups, and a little flaky salt.
Prep
25 min
Bake
45 min
Total
2 hr
Yield
One 9x5-inch loaf
A note from my kitchen
Before you bake this
This loaf is for the peanut butter cup people. It is full of chocolate, peanut butter, crisp streusel, and just enough salt to keep every bite balanced.
The topping is generous on purpose. The chopped peanut butter cups soften over the warm loaf, while the streusel keeps a little crunch.
It is rich, soft, and very easy to keep going back to, especially if chocolate and peanut butter is your thing.
Save me a slice ;)
Donut loaf
What makes a donut loaf a true donut loaf
A donut loaf is plush, glazed, and a little dramatic through the middle. The gooey center crease is the bite worth stealing first: soft, tucked under a thin glaze, and reminiscent of the center of a cinnamon roll. A little nutmeg keeps the crumb in old-fashioned donut territory.
Read this first
The quick notes.
Flavor
Chocolate, peanut butter cups, vanilla crumb, and flaky salt.
Texture
Soft loaf, crisp streusel, melty candy pieces, and a clean-slicing center.
Best moment
The warm peanut butter cups softening over the streusel after baking.
Pan check
Pan and oven notes
Fill level
These loaves are intentionally decadent and high-moisture, so the fill level matters. I do not recommend filling above about 2/3 full, even if that means you have a little batter left over.
Oven personality
My oven runs very fast, so the lower end of the bake time reflects a fast oven. If your oven usually takes longer, expect to land closer to the higher end, and sometimes 10-15 minutes beyond it. Use the visual cues in the recipe first.
Pan material
I test with Fat Daddio's anodized aluminum pans. Light aluminum heats evenly and gently; dark metal can brown and set edges faster; glass and ceramic hold heat longer and may need more time. None of these are wrong, they just bake at their own pace.
Ingredient notes
Key ingredients
Mini peanut butter cups
Chop them into a mix of small and medium pieces. Smaller pieces tuck into the streusel, while larger pieces on top melt into glossy pockets after baking.
Creamy peanut butter
A small spoonful in the streusel brings peanut butter flavor into the crumb topping without making it greasy or heavy.
Chopped chocolate
Chopped chocolate gives softer, uneven pockets through the loaf. It feels more generous than chips and keeps the chocolate from reading flat.
Maldon flaky sea salt
The flaky salt is not just garnish here. It cuts the sweetness from the candy and makes the peanut butter and chocolate taste fuller.
Brand notes
Brands that matter here
For the ingredients where brand choice changes texture, set, or flavor, these are the tested options I use.
Yogurt
Plain unsweetened yogurt
Plain unsweetened yogurt adds moisture, acidity, and body so the crumb bakes up tender without tasting tangy.
- 01Forager Unsweetened Plain Yogurt
- 02Silk Plain Unsweetened Yogurt
Milk
Milk
Milk affects how smoothly a batter, filling, or frosting comes together. Soy milk and Ripple tend to emulsify well because their protein and fat help create body and a creamier finish than many thinner nut milks.
- 01Silk Original Unsweet
- 02Plain unsweetened soy milk
- 03Ripple Original
- 04Oatly Barista Edition
Butter sticks
Plant butter sticks
Use plant butter sticks, not tubs, especially for buttercream and fillings that need to hold their shape.
- 01Country Crock Plant Butter Sticks
- 02Violife Plant Butter Sticks
- 03Earth Balance
- 04Miyoko's
Testing notes
Why this works
What binds the loaf without eggs
The yogurt, flour, cornstarch, and sugar work together to give the loaf structure. Yogurt adds moisture and body, while the flour and starch set as the loaf bakes, so eggs are not needed for this style of soft donut loaf.
Why there is apple cider vinegar
The vinegar reacts with the baking soda and helps give the loaf lift. It also balances the sweetness a little. You should not taste vinegar in the finished loaf.
Why room-temperature ingredients matter
Room-temperature yogurt and milk blend more smoothly with the oil and sugar. This helps the batter come together evenly, which gives the loaf a softer crumb and a more even bake.
Why the streusel is chilled
Chilling the streusel keeps the butter cold, so the crumbs hold their shape instead of melting straight into the batter. That is what gives the top its crisp, bakery-style texture.
Why this loaf rests in the pan
This loaf only needs a shorter 15-minute pan rest because the topping goes on while the loaf is still warm. That rest still matters: it lets the structure firm up enough to move while keeping the soft, cake-donut-style center.
Why the loaf rests before slicing
A 30-minute chill is enough to help the center and topping set cleanly. If you want a warmer slice, you can let it rest on the counter instead; I prefer the chill, then bringing slices back to room temperature, because the loaf feels set in all the best ways.
How it comes together
Small things that matter
Tips for the best loaf
Keep the peanut butter cups roughly chopped so the topping has visible pieces after baking.
Do not overmix once the dry ingredients go in. Stop when no dry streaks remain.
This loaf only needs about 15 minutes in the pan before transferring. The extra chopped peanut butter cups go on while the loaf is still warm so they soften slightly.
Chill the loaf for about 30 minutes before slicing so the chocolate and peanut butter topping have time to set cleanly, or let it set on the counter if you want it warmer.
Let chilled slices sit at room temperature before serving so the crumb softens again.
Before you slice
Texture and serving notes
This loaf slices best after about 30 minutes in the refrigerator, then tastes best once the slices have come back toward room temperature.
The top should stay textured, with the peanut butter cups softened into the streusel instead of fully melted away.
If the slices feel firm straight from the refrigerator, give them a little time on the counter.
Keep it good
Storage
Fridge
Store covered in the refrigerator for up to 4 days.
Fridge
For the best texture, let chilled slices come back toward room temperature before serving.
Recipe FAQ
Questions that come up
How do I know when Chocolate Peanut Butter Cup Donut Loaf is done baking?
Use the visual cues in the recipe first, then check the center. Loaves can take longer depending on your oven and pan material, so do not be surprised if you need a few extra minutes.
Which brands work best for Chocolate Peanut Butter Cup Donut Loaf?
Only for the ingredients where brand choice changes texture, set, or flavor. Those are listed in the brand notes on this page so you know where to be more specific and where you have room.
How full should I fill the loaf pan for Chocolate Peanut Butter Cup Donut Loaf?
I do not recommend filling the pan above about 2/3 full. It is better to have a little batter left over than to risk overflow, especially with rich loaves.
Why is my donut loaf taking longer to bake?
That is normal. My oven runs fast, so the lower end of the bake-time range reflects that. If your oven runs slower, use the higher end of the range and keep baking until the visual cues line up.
How should I store Chocolate Peanut Butter Cup Donut Loaf?
Store covered in the refrigerator for up to 4 days.