Oat Bar

Oct 13, 2026 · By VanillaGoods

Baking Cookies bars Vanilla: Extract Easy

Oat bar cut into squares on parchment on a wooden board

A buttery oat crumble pressed into a pan as a bottom and a top, with room for jam, fruit filling or caramel in the middle.

Prep 20 min

Cook 35 min

Cooling 15 min

Total 1 hr 10 min

Yield 24 bars

Diet —

Ingredients

Adjust yield

bars

1 ½ cups (190.0 g)all-purpose flour
1 ½ cups (135.0 g)old-fashioned rolled oats
¾ cup (160.0 g)light brown sugar, packed
½ tsp (3.0 g)baking soda
½ tsp (3.0 g)fine sea salt
¾ cup (170.0 g)unsalted butter, melted
2.0 tsp (10.0 ml)pure vanilla extract

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Instructions

Heat the oven to 350°F (175°C) and line a 9-by-13-inch pan with parchment.
Stir the flour, oats, brown sugar, baking soda and salt together, then stir in the melted butter and vanilla until clumpy.
Press two-thirds of the mixture firmly over the bottom of the pan. Spread the filling of your choice over it and crumble the rest on top.
Bake 30 to 35 minutes until the top is golden. Cool completely, then cut into 24.

Tips

Press the base firmly or the bars fall apart; the back of a measuring cup works.
Thick jam or a cooked fruit filling works; fresh fruit makes the base soggy.

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Recipe FAQ

How long does it take to make oat bar?

Plan on 20 minutes of prep and 35 minutes of cooking, plus 15 minutes to rest. The recipe makes 24 bars.

How should I store oat bar?

Store airtight at room temperature up to 4 days or freeze up to 2 months.

Can I make oat bar ahead?

The dough keeps 3 days in the fridge; bake fresh the day you need them.

Can I use a different form of vanilla?

Yes. This recipe uses 2 tsp pure vanilla extract (10 ml). Each teaspoon of pure vanilla extract can be swapped for 1 teaspoon of vanilla bean paste, the seeds of half a vanilla bean, or 1/2 teaspoon of vanilla powder. Paste and seeds add the classic dark specks.

A buttery oat crumble pressed into a pan as a bottom and a top, with room for jam, fruit filling or caramel in the middle.

Estimated · per serving

Nutrition

Per serving = 1 of 24 servings this recipe makes.

127 Calories / serving

6.2g Fat

16.4g Carbs

1.6g Protein

6.6g Sugar

Whole recipe (24 servings): ~3048 cal · 149g fat · 394g carbs · 38g protein · 158g sugar

Estimated values per serving, calculated from standard ingredient data. Not verified Nutrition Facts; actual values vary with brands, measurements, and preparation.