# Triangular Number Christmas Tree

Okay, okay, so it’s a little early… Well, a lot early. Still, before we know it, it WILL be the season! Here’s something to try in a few weeks…

Triangular Number Christmas Tree

1, 3, 6, 10… What’s the pattern?

Hint: If you can’t crack the code, try making a drawing of each number. Do you notice that you can make each number into a triangle?

1                           3                               6                                       10                                       15  . . .

These numbers are called triangular numbers. To model the pattern, why not whip up a Triangular Number Christmas Tree out of melt-in-your-mouth, black-bottom cupcakes? Here’s the recipe:

½ butter (1 stick)

1 cup sugar

1 egg

1 teaspoon vanilla

1 ½ cups flour

1 teaspoon baking soda

1 cup milk

Large, dark chocolate chips

1. Preheat the oven to 350 degrees.
2. Prepare cupcake tin by placing paper liners or greasing the tins
3. Mix the butter, sugar, egg, and vanilla thoroughly.
4. Add the flour and baking soda, alternating with the milk
5. Put several chocolate chips in each cupcake paper. Fill ½ full with dough.
6. Bake until a toothpick inserted in the center of each cupcake comes out clean.
7. Assemble the cupcakes as shown in the photo
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### One Response to Triangular Number Christmas Tree

1. Jane says:

What a gorgeous christmas tree cake. That will be good for anybody who has a birthday around Christmas time.