New York Crumb Cake

If you have ever walked into a bakery in New York and seen those huge squares of cake covered in a thick layer of buttery crumbs, this recipe is for you.

New York crumb cake is famous for one reason: the topping. The crumb layer is just as thick as the cake itself, sometimes even thicker.

The cake underneath is soft and tender, with a hint of vanilla. It’s the perfect base to hold up all those big, cinnamon-sugar crumbs on top.

You don’t need any special tools or fancy ingredients to make this. Just a square baking pan, two bowls, and about an hour of your time.

A light dusting of powdered sugar at the end gives it that classic bakery look. Serve it with coffee in the morning or as an afternoon snack.

Why You’ll Love It

Massive Crumb Layer – The topping is almost as thick as the cake itself for that signature New York bakery look.

Bakery Style at Home – You get that classic deli counter crumb cake without leaving your kitchen.

Sour Cream Magic – The sour cream keeps the cake layer soft and tender for days.

Recipe Ingredients

For the Crumb Topping

• 1/3 cup Granulated Sugar
• 1/3 cup Brown Sugar (packed)
• 1 tsp Ground Cinnamon
• 1/4 tsp Salt
• 1/2 cup Unsalted Butter (melted)
• 1 3/4 cups All-Purpose Flour

For the Cake

• 1 1/3 cups All-Purpose Flour
• 1/2 cup Granulated Sugar
• 1 1/2 tsp Baking Powder
• 1/2 tsp Salt
• 1/3 cup Unsalted Butter (melted)
• 1/3 cup Sour Cream
• 1 large Egg
• 1 tsp Vanilla Extract

For Dusting

• 2 tbsp Powdered Sugar

Directions

Step 1

Preheat your oven to 325°F (160°C). Grease an 8×8 inch square baking pan and line with parchment paper.

Step 2

Make the crumb topping first. Whisk together the granulated sugar, brown sugar, cinnamon, salt, and flour in a bowl. Pour in the melted butter and stir with a fork until thick, clumpy crumbs form. Some large chunks are exactly what you want. Set aside.

Step 3

For the cake, whisk together the flour, sugar, baking powder, and salt in a large bowl.

Step 4

In a separate bowl, whisk the melted butter, sour cream, egg, and vanilla extract until smooth. Pour the wet ingredients into the dry ingredients and stir until just combined. The batter will be thick.

Spread the batter evenly into the prepared pan. It will be a thin layer, and that is correct. The crumb topping is the star.

Step 5

Break the crumb topping into large and small pieces and scatter it generously over the batter. The crumb layer should be thick and piled high.

Step 6

Bake for 40 to 48 minutes until a toothpick inserted into the cake layer comes out clean and the crumb topping feels firm when gently pressed. The top should be golden but not dark.

Step 7

Let the cake cool completely in the pan. Once cool, dust generously with powdered sugar. Cut into squares and serve. The massive layer of buttery, cinnamon crumbs on top of the soft, tender cake is what makes this unforgettable.

My Tips

Melt the Butter for the Crumbs and Let It Cool

When you melt the butter for the crumb topping, let it sit for about 5 minutes before mixing it with the dry ingredients. Hot butter will melt the sugar too much and you’ll end up with a wet paste instead of crumbs.

The butter should still be liquid but not steaming. This is what gives you those big, chunky crumbs that make this cake what it is.

Squeeze the Crumb Mixture Into Big Clumps

After you stir the melted butter into the flour and sugar, don’t just leave it as small bits. Use your hands to press and squeeze the mixture into big chunks, some the size of a walnut and some smaller.

Then break those apart when you put them on the batter. This is the trick to getting that bakery-style topping with both large boulders and smaller crumbs all over the top.

Spread the Thin Batter Carefully

The cake batter is really thick and there isn’t much of it, so spreading it in the pan can be tricky. Use an offset spatula or the back of a spoon to push it into an even layer that reaches all four corners.

If the layer is uneven, some spots will bake faster than others and the crumb topping might sink into the thinner areas. A flat, even base keeps all those crumbs sitting on top where they belong.

More Recipes

• Brown Butter Apple Crumble Cake
• Cinnamon Roll Bread Pudding
• Lemon Ricotta Cake
• Salted Honey Butter Cake
• Strawberry Crumble Bars

Frequently Asked Questions

Why is my crumb topping turning into a flat layer instead of staying chunky?

This usually happens when the melted butter is too hot or when the mixture gets overmixed. Let your melted butter cool for a few minutes before adding it, and stir gently with a fork just until clumps form.

The goal is a sandy, clumpy texture with some pieces as big as marbles. If it looks like wet dough, add a tablespoon or two more flour to bring back that crumbly feel.